memory man

I'm not good at memory.
For example,remember the world's history etc...
So I respect this book's man!
When I read this book,I was very surprised!
Because the memory man remember the 250 books and
the detail of his life when he was young .
I cennot believe!!!
But he practiced any things when he was young.
So he could remember many things.
I thought try to practicing for my memory .