A review by graywild
The Battle of the Labyrinth by Rick Riordan

adventurous challenging dark mysterious sad tense fast-paced
  • Plot- or character-driven? A mix
  • Strong character development? Yes
  • Loveable characters? Yes
  • Diverse cast of characters? Yes
  • Flaws of characters a main focus? It's complicated

3.5

4th book of the Percy Jackson series - read the others or you will be confused.  Continuing story of Percy Jackson and his friends.  This story involves Annabeth and her quest (with Percy, Grover and Tyson) to find Daedalus and the Labyrinth (the maze that held the Minotaur).  Along the way they fight Luke and the growing Titan allies of Kronos.  Good pace on this story.