help! how to farm book of health, attack , intelligenc etc..

Hi everyone i play with a chaos mage level 3900, i run with cj 380% level increasea 10 and 1 trait of enemy creature. i closed a level 140 realm with this cj but i can’t still go far and book never drop, someone have some tips ?
another thing book of helath etc are dropped also in higher level realm but without cj modificator?

thank you all for your time and i hope someone can help me to obtain more of this powerful items!!!

Completing prophecies is the best way to obtain Tomes.

thank you so much!!!very helpful!!!