Originally Posted by
MonikaS
Also after passing your license does anyone still use books from time to time?
Yes, I do, really often.
For PPL studies I would recommend Wagtendonk; once you have some experience, or for CPL ground school add Coyle "The Art ... of Flying Helicopters". At that level Coyle's Cyclic & Collective might still be overwhelming, but later that's the ultimate book.