I published a book on Cheetah 3D (a nice 3d program for Mac OS X that conspicuously needs a manual). You can find out about it here http://loewald.com/c3dbook/
The main thing I learned is that if you need to sell your book for more than $10 (if it's aimed at a vertical market) split it into multiple $10 books or you'll be screwed by Amazon (which gives lower royalties for books between $10 and $20 than for $10 books). I ended up only selling my book through Apple and Lulu (and BN but that's useless).
Another problem is I've found most of the epub tools I've used to be fairly awful. Were I doing it over again I'd probably write the whole book in markdown and convert it to epub using scripts.
The main thing I learned is that if you need to sell your book for more than $10 (if it's aimed at a vertical market) split it into multiple $10 books or you'll be screwed by Amazon (which gives lower royalties for books between $10 and $20 than for $10 books). I ended up only selling my book through Apple and Lulu (and BN but that's useless).
Another problem is I've found most of the epub tools I've used to be fairly awful. Were I doing it over again I'd probably write the whole book in markdown and convert it to epub using scripts.