I'd highly recommend 7 Languages in 7 Weeks by Bruce Tate. It doesn't have Go, but it walks you through Ruby, Io, Prolog, Clojure, Scala, Erlang, and Haskell.

I'd highly recommend 7 Languages in 7 Weeks by Bruce Tate. It doesn't have Go, but it walks you through Ruby, Io, Prolog, Clojure, Scala, Erlang, and Haskell. It will give you a wide basic understand of why design tradeoffs have been made.