This will be the ultimate compilation of books by authors who have two first names.
For those who do not know the phrase "two first names", it refers to a person whose first and last name both could pass as typical first names.
Ex-
Shannon Hale would work.
Both "Shannon" and "Hale" are understandably first names.
Stephenie Meyer would not work.
While "Stephenie" is a first name, "Meyer" unfortunately is not.

To keep things organized, if you know of a author, only add one of their books, preferably the first book in their most popular series.
If you have questions or concerns about an author counting, ask in the comments, and I will provide my judgement.