Seven guests are trapped in a remote Irish guesthouse by a killer who has lured them there via an online booking app. The protagonist, one of the seven guests, seeks to survive the holiday and escape the guesthouse, but faces the immediate threat of the unknown killer among them. The remote location and the inability to escape create a claustrophobic environment where trust is impossible and survival is uncertain.

The Guesthouse is positioned as a chilling and twisty psychological thriller, with early praise highlighting its addictive and fun qualities, as noted by the Daily Mail. Reviewers like Alex Lake describe it as dark, claustrophobic, and full of suspense, calling it a gripping mystery and a fantastic debut. The book is noted for its atmospheric elements, including creaking floorboards and howling winds, making it a compelling read for those seeking mystery and mayhem. Its gripping nature has also been recognized by the Sunday Express.