Lock Every Door by Riley Sager, Paperback, Used Experience a thrilling and suspenseful ridewl with Lock Every Door by Riley Sager. This is a must read for auspense and thriller lovers. This 383 page book follows a thrilling story with psychological and suspenseful elements that will leave you on the edge of your seat. This thriller is written in English. Immerse yourself in the literary world of Lock Every Door and discover a story that will keep you entertained until the last page. This paperback book is pre-owned and in excellent condition. From a smoke-free home.