when I read 7 time, I can remember anything?

I'm reading a book, this book content is when I read 7 time a book, I can remember everything about book.
Usually, I read so slow and understand each small sentence.
But this book said to me, you need to fast read 7 time. Don't worry about understand.
Hmm, that's interesting. But I will try!

=Wish I hope your every moment chill.=