Cover Reveal: Shoestring Theory by Mariana Costa

Cover Reveal: Shoestring Theory by Mariana Costa

We at the Asylum are excited to help Angry Robot Books host the cover reveal for Mariana Costa‘s upcoming Fantasy Romance novel, Shoestring Theory, along with many other excellent bloggers. Shoestring Theory is set to be published on October 8th, 2024!

Meet the Author

Mariana Costa was born in Brazil (allegedly) fully formed from a hole in the ground. She is a creature who eats stories and then she spits out new ones to repopulate the ecosystem. Whether these new stories are better or worse is for you to decide by eating them yourself. Bon appetit! Her Sun is in Cancer.

Connect with Mariana Costa
Book Cover

Before I show you the cover (it’s worth the wait, I promise), the little robots told me that this book features a cat, so they wanted us to show you our own pets along with the cover. Just to pull on your heartstrings (yes, wordplay totally intended, thank you very much) and all that. Trouble is, I don’t have a cat. The only thing I can show off are my super cute and fluffy plush pandas (someone somewhere will write a fantasy book with pandas, and that’ll be my time, finally!). Thankfully, I do have a team, and Arina kindly shared some pics with me. Look at the cutie!

Now I got your attention, here is some more info about the Shoestring Theory: it has a formidable Great Aunt, a friends-to-lovers-to-enemies-to-lovers romance, an awkward love quadrangle and a crow familiar called Ganache. If that doesn’t catch your interest, I don’t know what will. And now to the cover.






⊂ ʕ•ᴥ•⊂ʔ

Cover Design by Alice Coleman (

Book Blurb
Shoestring Theory asset

The kingdom of Farsala is broken and black clouds hang heavy over the arid lands. Former Grand-Mage of the High Court, Cyril Laverre, has spent the last decade hiding himself away in a ramshackle hut by the sea, trying to catch any remaining fish for his cat familiar, Shoestring, and suppressing his guilt over the kingdom’s ruin. For he played his part – for as the King, Eufrates Margrave, descended further and further into paranoia, violence and madness, his Grand-Mage – and husband – Cyril didn’t do a thing to stop him.

When Shoestring wanders away and dies one morning, Cyril knows his days are finally numbered. But are there enough left to have a last go at putting things right? With his remaining lifeblood, he casts a powerful spell that catapults him back in time to a happier period of Farsalan history – a time when it was Eufrates’s older sister Tig destined to ascend to the throne, before she died of a wasting disease, and a time when Cyril and Eufrates’s tentative romance had not yet bloomed. If he can just make sure Eufie never becomes King, then maybe he can prevent the kingdom’s tragic fate. But the magical oath he made to his husband at the altar, transcending both time and space, may prove to be his most enduring – and most dangerous – feat of magic to date…

A time-travelling, cosy romantasy for fans of Legends and Lattes by Travis Baldree

Shhh! There might be an ARC request form link among the pre-order links, just saying 😉


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