Zed himself recommends Django book as the Next Steps[1] at the end of LPTHW. If he wants to dig deep into Python Dive into Python [2] would be a great book to start working on next.
For other language I would recommend some static type language just to broaden his programming understanding.
[1] http://learnpythonthehardway.org/book/next.html
[2] http://diveintopython.org/