Join the green library and read books for free, and share the books you have.
https://docs.google.com/spreadsheets/d/1InGFPTsnXSGf1IwwdsXlrpRJUUD-D-w3-zcSY0kEv34/edit?usp=sharing
You can join, get a book, and read it. When the next person wants it, they will contact you, and you will arrange to give it to them.
There are no due dates, nor are there any permanent collections.