CompTIA textbooks or other revision materials (Brize Norton OX18)

I'm stuck in a rut and want to try and improve myself this year.

One thing I want to get sorted is my CompTIA A+ certification, but the books are very expensive new. I know this is a popular IT cert so I'm wondering if anyone has any textbooks they no longer need.

I'm primarily seeking A+ materials but I would also be open to Network+, Security+ or other certs since I'll probably look into doing those down the line. Thanks!