"Книга-игра: Нокти срещу огън" is a free Android gamebook developed by xsmind. This gamebook is a sequel to "Книга-игра: Реката". "Нокти срещу огън" is a thrilling adventure gamebook that takes place in a land overrun by bloodthirsty monsters. You will be taken on a journey to a mysterious palace where three brave men are risking their lives in a battle of wits and strength. The fate of humanity rests on the outcome of this battle.

The gamebook is written in Bulgarian by the authors Lyubomir Nikolov and Colin Walumbury, with illustrations by Ivaylo Ivanchev and cover design by Petar Stanimirov. "Книга-игра: Нокти срещу огън" is a must-play for anyone who loves adventure gamebooks and is looking for an engaging and thrilling experience.