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so im building a solid body five string neck thru body bass , the top and back are Franquette Walnut and the core is Curly Maple along with some black spacers . My question is what grit do i sand to to before i laminate the wood ?

Um, can you give us some more specifics about your build?

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"Act your age, not your shoe size" - Prince

sure . The the wood will be sandwiched together ...walnut, black spacer, maple, black spacer ,walnut . the walnut is bookmatched but wont be used that way because the neck will be between the upper and lower bout . I'm not sure what other info you need . The wood is already sanded to 100 grit , in order to get a clean glue joint what grit do i need to sand to or is 100 grit good enough .

Thats what i was thinking but wanted a more experienced opinion . Every thing is flat so that wont be a problem . I figured the finer the edge the better so i was going to go to 400 grit but if i dont have to im not . thanks you've been a great help .

which glue was my next question and titebond was my first pick .thanks

100 grit is fine, the important thing is that it's all flat. Titebond is fine to use, but lately I have taken to using veneering glue (you can find it though veneersupplies.com) just because I have done a couple bodies with veneer layers between the top from the core (so you get a pinstripe when you round over the edges), and veneering glue seems not to curl the veneer as much as regular wood glue. The selling point is that it also dries harder (like hide glue), whereas yellow glue is a little softer. That's what the product info says, and it seems to be true. I don't think it makes a huge difference, though.