Series
There are 5 books in the The Heroes of Olympus series.
Published between 2001 and 2013. The publication order differs from the reading order — both are below.
Jason Grace wakes aboard a school bus with no memory of his past, launching a quest with Piper and Leo to rescue Hera and prevent an ancient evil from rising. Riordan introduces a new generation of demigods while expanding his mythological world to encompass both Greek and Roman traditions in this s
All 5 books total 2,796 pages.
The Books Oracle — track the series you are partway through, and see what to read next.