The Percy Jackson books are staples of the 2000s and 2010s, and the Disney+ adaptation is reigniting interest in Rick Riordan's stories — though readers may be left wondering what to pick up after they've finished his Greek-mythology-inspired middle grade adventures. There's a lot to love about Percy Jackson & the Olympians and its sequel series, The Heroes of Olympus, from their entertaining takes on gods and legends to their heartwarming and hilarious cast of characters. The Percy Jackson books have a strong voice and stronger messages about friendship, bravery, and love. Such strengths make them hard to follow.