Library and Book suppliers
Cambridge Public Libraries
The Public library service is a great place to get book group books.
https://www.cambridgeshire.gov.uk/info/20002/libraries_leisure_and_culture
You can even join up online!
https://cambridgeshire.spydus.co.uk/cgi-bin/spydus.exe/MSGTRN/OPAC/BRWREG
And also access E-books.
https://www.cambridgeshire.gov.uk/info/20060/online_library_services/70/online_library_services
Nearest public library is Barnwell Road
https://www.cambridgeshire.gov.uk/directory_record/3169/barnwell_road_library_cambridge
Online Retailers
There are many sellers of books and e-books, here a couple to get you started
E-books