The Maze. Tor's Quest, #2

Death and betrayalWhen the King died, leaving his throne to whoever succeeds in a quest, Prince Tor's brothers readily accepted the challenge. Tor was more reluctant. Now that he has lost friends and at least one brother is dead. When a clue required Tor and his companions to find 'a guide from another world', a witch dragged a young woman from her own world to a land filled with magic, mythical creatures and dangerous monsters.
Having convinced her to aid him in his quest, Tor has successfully procured the latest clue and is one step closer to obtaining the throne. Now he just has to persuade her to go through agony in order to find the next clue, or another guide must be found. When the group discover that they need to enter a maze, from which nobody has ever escaped, one of the team must be left behind. Once inside the maze, they will need to solve a series of puzzles to continue the quest, with death being the penalty for each wrong answer.
Nobody is safe, as one of Tor's brothers finds out the hard way, and Tor discovers that he cannot trust all of his friends when he uncovers a betrayal. A chance remark leads to one of the team finding out that the quest has a twist, making it even more deadly than any of those taking part could ever have imagined.