The House of Hades / Rick Riordan / 596 pages

This is the 4th book of the Heroes of Olympus series.  Riordan's writing style is again superb in the blending of details with the action of the story.  The heroes continue their trek to the Doors of Death, Percy and Annabeth through Tarturus and the rest over land and sea.  We find out why Nico has been such a loner the last few years.  Mild parent warning here, you might want to read this book before letting your kids read it.  I am anxiously awaiting The Blood of Olympus to finish out this series.