The Ruby Way is an excellent book for experienced programmers to get  
a good look at many different things in Ruby.
But there are lots of good Ruby books! You should probably head down  
to a bookstore that carries them and browse them for the one(s) that  
will serve you best.
I'm trying to collect them all. I just wish they came with  
collector's cards or something collectible.
(that might not be a bad idea to create a market for outdated (in the  
future) computer books.