The Internet Archive is a digital library with millions of free public domain books. Many older Gujarati translations (pre-1950) are now out of copyright.
Sometimes, publishers release older editions for free via Google Books. KAMASUTRA PDF BOOKS IN GUJARATI Free
This edition is famous for its academic approach. It includes footnotes explaining ancient Indian references that a modern reader wouldn't understand. Copies of this are hard to find in print but circulate as scanned PDFs on academic forums. The Internet Archive is a digital library with