Have you ever gone to the library? Normally everybook has tags.
Tags is the easiest ways to find out the books which have same topic. So you should give a post in Helping Center some tags.
So how can I tag a book? It is so easy, after writing a post in Helping Center, look at the end of page :
Look at this example: try to click it to read tagsattitute B2B book Book summary business business book Bussiness book eurusd forex Forex trader forex trading success forex trading success losses emotion kindness overcoming mindset ghost writers ghost writing ghost writing service human brain INTROVERT I want to get a Book Written Making friend Professional writers Startup Start up Experience Startup Experience writers writing service