I not too recently became a big proponent of zsh (http://www.zsh.org/ http://www.zsh.org/) and as such would like to recommend the book "From Bash to Z Shell" (

I not too recently became a big proponent of zsh (http://www.zsh.org/ http://www.zsh.org/) and as such would like to recommend the book "From Bash to Z Shell" (http://www.amazon.com/exec/obidos/tg/detail/-/1590593766/ref=ord_cart_shr?_encoding=UTF8&m=ATVPDKIKX0DER&v=glance http://www.amazon.com/exec/obidos/tg/detail/-/1590593766/ref...) as it covers both of these popular shells and how to "Conquer" them.