"Assassin's Blade: Throne of Glass" by Sarah J. Maas is a thrilling prequel novella series in the Throne of Glass series, published by Bloomsbury Publishing USA in 2015. 

This young adult fantasy book is written in English and spans 464 pages of action-packed adventure. With a focus on themes of fantasy, magic, and epic storytelling, this trade paperback is perfect for fans of the genre looking to delve into the world of the assassin, Celaena Sardothien.