Unless your printer is insisting on the job being done in Illustrator a multi-page document such as this should be set up in InDesign since that is what the program is designed for. That being said judging on the printer specs your art boards should be set to 6 in x 9 in and your bleeds should all be set for .0625 in since the specs show a total of 6.125 in x 9.125 in. See screenshot below: Again, though, I strongly urge you to find out if this job can be set up in InDesign. An Illustrator file with possibly 100 art boards is a very scary prospect to me.
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