nixCraft has posted a review of Tarsnap Mastery: Online Backups for the Truly Paranoid.
nixCraft makes a deliberate practice of listing pros and cons for each book they review. This is a good idea. The only con that they list is that “you most definitely need some basic Unix command-line knowledge.”
I can live with that. If you can’t use a command line, you shouldn’t be using Tarsnap.