books
DOAB (Open Access Books)
The book counterpart to DOAJ: a directory of peer-reviewed open-access academic books, numbering around 95,000 titles. Its catalogue is searchable through a keyless interface and is also browsable on the web. Turn to it when you need scholarly monographs and edited volumes that are free to read.
Books API
Why it’s useful & how it works
DSpace REST, no key. API works both ways; the portal HTML CF-challenges some proxies. Books-side complement to DOAJ. (Probed twice: as 'doab' and 'doab-books'.)
What’s inside
~95k OA books.
API access
Access
Programmatic API access (a key may be required — see the API tag).