Talk:Keefe and Sophie/@comment-35842344-20190220030106/@comment-37719459-20190220131044

My advice:

1. PJO

2. Demigod Files.

3. Kane Chronicles.

4. Demigods and Magicians crossover book.

5. Heroes of Olympus

6. Demigod Diaries

7. Trials of Apollo and Magnus Chase happen at the same time, so you can read either of those first.