Personally, I don't think there is a book that does a really good job. Probably because tuning the idle and transition circuits gets real complicated real quick. And because carb tuning is as much about sensing what needs attention as it is about reading the O2.

Main jets, power valves and PVCRs are not hard to get a handle on. But bleeds, slots, and emulsions are another matter entirely. And just to further complicate things, all those circuits and items come and go with most overlapping each other making it extremely difficult to understand what is causing what.

It takes an enormous amount of time experimenting with different tweeks to see how your particular combo responds. That is AFTER a good amount of reading books and studying the different circuits of your carb.

The best thing to do is to start with a carb that has a tune in it that is as close as possible to the correct tune that your combo wants. The farther off the initial tune is, the more circuits or items that will have to be corrected making the job just that much more difficult.

Or you could contact someone like ThumperDart to get the tune close enough that you can tweek it on in without having to understand the entire low speed design of your carb.