Monster Pen Pal Letters
It started with our Book Boyfriend Boxes. Readers kept telling us how much they loved the letters from their fictional love interests, so we decided the monsters deserved mailboxes of their own.
Monster Pen Pals brings one of our readers’ favorite parts of the Book Boyfriend experience straight to your mailbox, with eight dangerously irresistible monsters waiting to write to you. Choose from four Romantic & Sweet monsters ready to charm, adore, and sweep you off your feet, or venture to the darker side with four Dark & Spicy monsters bringing obsession, temptation, and a whole lot more heat.
Every letter is written directly to you, putting you at the center of your own ongoing monster romance. Choose digital delivery for instant gratification or a physical letter you can hold, keep, hide in your nightstand, or collect.
But don’t get too attached.
Only 100 physical letters are available from each monster. Once all 100 have found their reader, that monster retires and a new round of monsters takes their place.
Choose your favorite. Pick a side. Or collect all eight before they disappear.
Now there's only one question: how do you like your monsters?
Now there's only one question: how do you like your monsters?
What is a Monster Pen Pal?
The Demon King
“Be careful what you summon, little mortal. I might decide to keep you.”
The Villain
“You already know I’m a bad idea. Swipe right anyway.”
The Dragon Rouge
"Come closer, darling. I have more than enough ways to keep you occupied."
The Kraken
“I steal pretty things for a living. Try not to look so tempting.”
The Vamipre Lord
“I’ve had centuries to wait. I don’t mind waiting a little longer for you.”
The Wolf Shifter
“I’ve spent my whole life running wild. You might be the reason I finally stay.”
The Fae Prince
“Take my hand. I promise the stories about my realm left out the best parts.”
The Minotaur
“Everyone gets lost sometimes. Lucky for you, I know the way home.”
Meet the Monsters
Amanda on Sep 24, 2026
5 out of 5 stars
If you are on the fence about ordering a set of letters for yourself, buy them! They are worth every penny! The writing is so beautiful, the paper is high quality, and the shipping was faster than I expected.★★★★★
Customer Reviews
Mersi on Jun 26, 2026
5 out of 5 stars
This was so beautiful!! I cried so hard, but it was perfect!★★★★★
C on May 10, 2026
5 out of 5 stars
So fun! I keep the little card in the back of my phone, just so I keep my fae near me lol★★★★★
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