The best aviation page I think is
Online Flight Training Courses and CFI Tools | Boldmethod .... quizzes, article, a lot of knowledge.

For practice, like ppl exam, weather, navi etc etc topics,
Best apps for pilots - iPhone, iPad, Android | Pilotapplications.com you can read about and choose from many different apps, and also can look around at Foreflight com or similar

this homepage show the books I just googled out? https://www.thebalancecareers.com/bo...raining-282673 but I am really confused, is it worth to read everything, or the goal is just to find the best book, which contains "all" knowledge, like my PPL book (it's a hungarian one, as I fly here).