is not what you put in them, but what you have to leave out.  I've written a series of chess books with Tim Onions, the latest of which will be published next week.  But oh, the pain I go through when we decide to leave out important ideas and examples.  Anyhow, if you're curious about what we might have put in if the books were a bit longer, we have some free extra examples.

Oh, and the other problem is that if you publish some recommended books, they will go out of print.  So we're going to keep our recommended book list online instead of putting them in the books.