As always, if you like TfK and want to help out at no cost to yourself, just start your amazon.com searches from the links in the sidebar. If you do that, we get a percentage of your purchase (and no identifying information, never fear!). It isn't a lot, but it helps keep the ever-growing pile of books from shrinking.
Between generous fans, Google adwords, the iTunes commissions and the amazon.com commissions, TfK grosses a couple hundred dollars a year. If it weren't fun, I wouldn't do it. Knowing that there are people out there showing an interest, whether they leave comments or tips in the jar is icing on the cake. Thanks to all of you.