I've been skimming through Falnagan's "Ruby Programming Language" to see if I should spend the time to learn Ruby. Their presentation is similar to K&R, with the exception of nonexistent practice problems, which I think is what made K&R so great.<p>Now I'm tempted to pick up the new Pickaxe book, but should I? In what ways does the Pickaxe do well while Falnagan's does not?