just found myself in a frustrating spot. was able to obtain some konan books from previous coupon rebate and the books i got.... i already was able to get them when i bought them with the fragments i saved up. never thought they would be available through coupons and now i have 2 of her books... which i couldve just.. saved my frags. used those books, and probably complete her breakthrough but yeah... will there ever be a time where we can just trade these books for half the fragments or something? i think selling them for coins is like... so not worth it T-T