I can't give you free books, but I think you'll like these.
Simple versions of real books. CEFR A1 to C1.
When you want more than a 'student reader'. CEFR B1-C2
30 excellent books in clear English. CEFR A2-C1
A dozen books to read without a dictionary. CEFR B1-C1
99% conversation, in natural English. CEFR B1-C1
My articles, jokes, riddles, suggestions. CEFR B1-C1
...but graphic novels do not have very easy text. B1-C2
Translate non-literal expressions. CEFR B1-C2