I think best place for Book3s is Trees @ Hanging Gardens. Plus there is the exceptionally Rare Chance of getting book4 too Since Wind Tree is lv110. But there is also the Eagle Spawn which comes which is lv150. So if u have IM Remote just set it to autorun if hp above 1200 or 1300. And they will run auto from eagles.
I like Sharks for Book4s personally. They Drop Book4, MSB, and Fun Tokens. So if you train 4 Pets with 4 ppl u could get 8 of each in a drop. Or 2 Fun Tokens on each person.
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