Project Gutenberg provides listings of the ebooks added to their project in a number of formats, including the GUTINDEX Listings By Year as seen here (used by this API): http://www.gutenberg.org/dirs/GUTINDEX.2019
# Fetch all authors
/authors
# Fetch authers by name search
/authors?byName={name}
# Fetch all books
/books
# Fetch books by title search
/books?byTitle={title}
# Fetch books by name search
/books?byName={name}
#Fetch books by name and title search
/books?byName={name}&byTitle={title}
# Fetch book by Id
/books/{id}