Amazon.com e-Books & Docs: Programming: Here’s an interesting trend in programming books: cheap little PDFs that show you how to do one very specific thing. Consider some of the titles on this page:
Accessing a MySQL Database with a VB.NET Component in an ASP.NET File
An ASP.NET Mobile Web Application to Monitor and Control a Server Farm
Any of these subjects would be a page or two in a larger book, but you can buy them here for less than $10, for immediate download.
Paging through this list, a lot of these are .Net titles, and the thumbnail looks like other Microsoft books (the yellow and black over that’s in vogue right now). This makes me think Microsoft has some kind of official program for developing these titles.