The Heroes of Olympus Book Five: The Blood of Olympus Hardcover – October 7, Satisfying finale full of gods, giants, and fond farewells. Read Common Sense Media's The Blood of Olympus: The Heroes of Olympus, Book 5 review, age rating. Rick Riordan is the creator of the award-winning, bestselling Percy Jackson series and the thrilling. Kane Chronicles and Heroes of Olympus series. According.