Gabriel Hunter Books in Order

Thirteen-year-old Gabriel awakens in an underground prison from which no one has escaped alive. Solving a mysterious tablet puzzle gives him and two unlikely allies one day to collect magical objects, provided they can overcome the divisions separating their peoples.

Gabriel and his friends escape one dangerous world only to become captives in freezing Bibliotheca. Their return home depends on entering a magical maze of books, solving its puzzles, and defeating the enemy threatening the people who hold them.

Back from Bibliotheca, Gabriel learns his brother has been accused of murder. Another portal takes him and his friends into a dangerous world where finding Jason and reaching a powerful elixir atop Skull Mountain become a race against time.