Speaking of BSD. While the OpenBSD guys are not on the Humble charity list, The FreeBSD Foundation is, and both Peter N.M. Hansteen and Michael W. Lucas (the authors of the two of the respective books you mentioned) seem to be into FreeBSD also.

So to anyone else buying the bundle primarily for the books on OpenBSD, and who happen to support FreeBSD also:

1. Log in or create an account.

2. Go to https://www.humblebundle.com/store/select-charity/charity/21... and select it as your chosen charity to support.

3. When you go to pay for the books adjust the sliders so that you give some percentage (I chose 100%) to charity and under charity adjust the slider for The FreeBSD Foundation (once again I chose 100%).

Deal? Deal!