Lesson Studio will be ready very soon. So until then you can visit StudySphere Educational Portal or:
The Road to Reality by Roger Penrose is an amazing book. But the math is probably just over the heads of most of those interested in reading it. I too had to catch up with the math required to read this book and found myself reading quite a few poor math books. This collection assembled here is made up of those few books that I found that really helped on my road to reality.
A completely unrelated financial blog.