That's why I made friends with the RNG system and got 2 books in the same event ^w^
(The fact that some people I know have farmed more than twice the time I took to farm and yet found no book ._.)
What to do with this book?
1) Sell it.
2) Give it to a friend who has been working ever so hard.
3) Do a giveaway.
4) Burn it.
Panda used differentiate!
...but it wasn't very effective...