How to BookMark/Save a Book on Raywanderlich website?

PS: I am new here. I started reading a book. Daily I search that book to start again.

Welcome @pravalika12! When you start reading a book on the website it should automatically bookmark where you left off. If you look below, you should see a green button at the book’s main page page that says “Keep Reading:[Chapter Title]”.
Screen Shot 2020-12-07 at 8.12.28 AM