I think it's better to search for some tutorials on Youtube, DeviantArt, Pinterest or Pixiv instead of looking for a book. It's hard to find a good book for that, and there are plenty of good online tutorials for drawing and coloring manga
The Complete Guide to Self-Publishing Comics is pretty good.
It's more of a general guide that also includes writing (and as you can probably guess, it's technically for a different style), but they've got some really great sections in there on how to color quickly/well, as well as how to do good page layouts.
The best book I know about Manga creation is Manga Techniques series, in which is published by Japanese Company Deleter, but it is more about Traditional way of making comics, as that is Deleter has their market. Also you need someone to translate them from Japanese, as the English version are very badly translated. I mean badly.