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Mark O’Brien

@bookmarkobrien.bsky.social
6.7K followers 164 following 1.7K posts

Associate literary agent at Azantian Literary Agency, previously at NetGalley, Writers House, Triada US, and more. Queer, neuroscoundrel, he/him. #1 fan of my perfect cat Monroe and onion rings. Freelance edits: bookmarkobrien.com

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Mark O’Brien @bookmarkobrien.bsky.social · 04/10/2026
Close-up photo of my perfect tabby cat Monroe’s face as she’s lying on my bed
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Mark O’Brien @bookmarkobrien.bsky.social · 26/09/2026
Ms. Monroe has acquired a new box
My perfect tabby cat Monroe sitting in the corner of her new box, her big eyes as wide as possible, licking her chops as she surveys her queendom
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Mark O’Brien @bookmarkobrien.bsky.social · 25/09/2026
My perfect tabby cat Monroe cuddling in my bed with my leg, looking up at me as I scratch the back of her head how she likes it
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Mark O’Brien @bookmarkobrien.bsky.social · 14/09/2026
Keith Riegert, president of the Stable Book Group and CEO of Perfect Bound, has been a vocal advocate for the use of Al in publishing—despite calling himself a "hardcore techno-pessimist." He tells PW, "I do this because you use Al or you die at this point."Meme of a selfie of a bandaged guy in a hospital bed above a text that says “I lived bitch”
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Mark O’Brien @bookmarkobrien.bsky.social · 13/09/2026
Monroe read your posts, and she has concerns.
My perfect tabby cat Monroe looking at the camera with big wide beautiful eyes
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Mark O’Brien @bookmarkobrien.bsky.social · 27/08/2026
My perfect tabby cat Monroe lying on the windowsill, front paw outstretched, gazing out the window at the trees, her reflection visible in the glass if you look closely
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Mark O’Brien @bookmarkobrien.bsky.social · 06/08/2026
Fixed a toilet on my own…
Small baby monkey in white pajamas and a pink headband getting their picture taken against a backdrop of flowers, posing while gazing into the camera, as if to say, “Who, lil ol’ me?”
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Mark O’Brien @bookmarkobrien.bsky.social · 03/08/2026
Close-up of my perfect tabby cat Monroe fast asleep on a green comforter on my bed
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Mark O’Brien @bookmarkobrien.bsky.social · 03/08/2026
real silly girl hours
My perfect tabby cat Monroe lying on the carpet with a rainbow-colored toy wrapped loosely around her ear and held between her front paws
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Mark O’Brien @bookmarkobrien.bsky.social · 28/07/2026
Good Monroe morning
My perfect tabby cat Monroe lying in my bed, looking at the camera
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Mark O’Brien @bookmarkobrien.bsky.social · 16/07/2026
Professional achievements: •working with my incredible clients •11 years in book publishing next month •I am the Wikipedia editor who added this image to the article for Becky Albertalli
AOC holding a copy of Becky Albertalli’s debut novel, Simon vs. the Homo Sapiens Agenda
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Mark O’Brien @bookmarkobrien.bsky.social · 15/07/2026
Sorry I can’t be her
Connect 4 game
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Mark O’Brien @bookmarkobrien.bsky.social · 14/07/2026
Moving here ✌🏻
Welcome to Easy World where everything is easy
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Mark O’Brien @bookmarkobrien.bsky.social · 08/07/2026
Let her be clear: meow.
My perfect tabby cat Monroe sitting on a brown couch, her eyes wide as she looks out the window
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Mark O’Brien @bookmarkobrien.bsky.social · 01/07/2026
My perfect tabby cat Monroe taking a nap on my brown couch
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Mark O’Brien @bookmarkobrien.bsky.social · 01/06/2026
Happy Pride, but especially to her
Close-up of a teddy bear with a blonde shake-and-go wig, a pink lash, and a dream. The chyron says her name is La Transbear. I would die for La Transbear.
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Mark O’Brien @bookmarkobrien.bsky.social · 21/05/2026
same
My perfect tabby cat Monroe lying on the carpet, her eyes almost but not quite closed
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Mark O’Brien @bookmarkobrien.bsky.social · 13/05/2026
Fantasy writers:
Lyrics to “Maps” by Yeah Yeah Yeahs:

Maps
Wait, they don’t love you like I love you
Wait, they don’t love you like I love you
Wait, they don’t love you like I love you
Maps
Wait, well, they don’t love you like I love you
Wait, they don’t love you like I love you
Maps
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Mark O’Brien @bookmarkobrien.bsky.social · 29/04/2026
'Cause I couldn't even be her if I tried I'm opposite, I'm on the other side I feel all these feelings I can't control Oh no, don't know why All this sympathy is just
Pixelated old Vine of a kid running, captioned “A KNIFE!”
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Mark O’Brien @bookmarkobrien.bsky.social · 28/04/2026
hello, and furthermore, meow
Selfie with my perfect tabby cat Monroe sitting in my lap
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Mark O’Brien @bookmarkobrien.bsky.social · 25/04/2026
Woke up to this beautiful view today 🥹
My perfect tabby cat Monroe lying down in my bed
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Mark O’Brien @bookmarkobrien.bsky.social · 21/04/2026
you know who else cared deeply about the pitt?
Leslie Knope from Parks & Recreation
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Mark O’Brien @bookmarkobrien.bsky.social · 18/04/2026
Good Monroe morning
My perfect tabby cat Monroe looking right at the camera
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Mark O’Brien @bookmarkobrien.bsky.social · 08/04/2026
Let’s be clear: meow
My perfect tabby cat Monroe lounging about
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Mark O’Brien @bookmarkobrien.bsky.social · 29/03/2026
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Mark O’Brien @bookmarkobrien.bsky.social · 22/03/2026
Me when conferences don’t pay
And I Am Telling You I’m Not Going
1982 single by Jennifer Holliday
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Mark O’Brien @bookmarkobrien.bsky.social · 15/03/2026
My perfect tabby cat Monroe hanging out on the couch with me, paw atop my knee, eyes big and wide
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Mark O’Brien @bookmarkobrien.bsky.social · 13/03/2026
Same
My perfect tabby cat Monroe, mid-yawn
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Mark O’Brien @bookmarkobrien.bsky.social · 09/03/2026
Snugglebug McGillicuddy, Esq
My perfect tabby cat Monroe cuddling with me on my lap
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Mark O’Brien @bookmarkobrien.bsky.social · 06/03/2026
hello! from leg
My perfect tabby cat Monroe lying atop my legAnother angle of my perfect tabby cat Monroe lying atop my legYet another angle of my perfect tabby cat Monroe lying atop my leg
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Mark O’Brien @bookmarkobrien.bsky.social · 06/03/2026
Good Monroe morning!
Photo of my perfect tabby cat Monroe cuddling with me in my lap
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Mark O’Brien @bookmarkobrien.bsky.social · 28/02/2026
Please Us, Other Door
A sign in a shop that reads “Please Us Other Door”
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Mark O’Brien @bookmarkobrien.bsky.social · 25/02/2026
you just have to see her! you just have to see her. you just have to see her. you just have to see her. you just have to see her. you just have to see her. you just have to see her. you just have to see her. you just have to see her. you just have to see her. you just have to see her. you just have
My perfect tabby cat Monroe half-asleep in my bed
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Mark O’Brien @bookmarkobrien.bsky.social · 22/02/2026
Good Monroe morning!
My perfect tabby cat Monroe lying at the foot of my bed, looking off to the side in the cool early morning light
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Mark O’Brien @bookmarkobrien.bsky.social · 17/02/2026
hangin the gosh-diddly darn heck out
Selfie of me on a couch with my perfect tabby cat Monroe sitting on the back of it, her paw on my shoulder as she looks at me
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Mark O’Brien @bookmarkobrien.bsky.social · 05/02/2026
Good Monroe morning and happy Monroe’s birthday to all! 🥹
My perfect tabby cat Monroe cuddling with me on my lap
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Mark O’Brien @bookmarkobrien.bsky.social · 02/02/2026
Live from Lap
My perfect tabby cat Monroe lying on my lap, looking at the camera
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Mark O’Brien @bookmarkobrien.bsky.social · 30/01/2026
Keep on the sunny side, always on the sunny side Keep on the sunny side of life It will help us every day, it will brighten all the way If we keep on the sunny side of life
My perfect tabby cat Monroe luxuriating in a sunbeam on the carpet
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Mark O’Brien @bookmarkobrien.bsky.social · 27/01/2026
Good Monroe morning
Close-up of my perfect tabby cat Monroe’s face as she lays on the carpet, eyes wide
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Mark O’Brien @bookmarkobrien.bsky.social · 25/01/2026
Good Monroe morning!
My perfect tabby cat Monroe lying in her rainbow-colored cat bed
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Mark O’Brien @bookmarkobrien.bsky.social · 19/01/2026
hello
Close-up of my perfect tabby cat Monroe’s beautiful face as she stands on me in my bed
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Mark O’Brien @bookmarkobrien.bsky.social · 12/01/2026
If I ever ask whether you caught the big game last night, please know I am talking about this
The ol’ ball on a string in a cup game
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Mark O’Brien @bookmarkobrien.bsky.social · 11/01/2026
ma’am…
My perfect tabby cat Monroe asleep in her rainbow-colored bed, one hind leg sticking up in the air
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Mark O’Brien @bookmarkobrien.bsky.social · 11/01/2026
Me too, Ms Monroe
My perfect tabby cat Monroe lying in her rainbow-colored bed, visibly sleepy yet awake
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Mark O’Brien @bookmarkobrien.bsky.social · 07/01/2026
Photo of my perfect tabby cat Monroe lying comfortably atop a backpack by the window, one eye open, sunbeams all over her
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Mark O’Brien @bookmarkobrien.bsky.social · 06/01/2026
And now a moment of Monroe
My perfect tabby cat Monroe lying on my lap
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Mark O’Brien @bookmarkobrien.bsky.social · 26/12/2025
Hello -Monroe ft. Cup
Close-up blurry photo of my perfect tabby cat Monroe’s face as I scratch her behind the ear where she likes
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Mark O’Brien @bookmarkobrien.bsky.social · 19/12/2025
meow
My perfect tabby cat Monroe sitting on the floor, looking up at me, her eyes wide, whiskers long and majestic. She is the most wonderful creature, God’s favorite cat.
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Mark O’Brien @bookmarkobrien.bsky.social · 16/12/2025
I just know Monroe thinks about me when she listens to Paparazzi by Lady Gaga
My perfect cat Monroe lying on the carpet
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Mark O’Brien @bookmarkobrien.bsky.social · 13/12/2025
Monroe, also known as Monrosie, Monroe Josephine, Monroe Row Row Your Boat, Roeroe, and Ms. Meow, among other known pseudonyms
My perfect tabby cat Monroe looking up at me with wide eyes and the intent to pounce
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