You may not have python-git installed. Just download the book as a zip from githib and unzip it under applications.
On Thursday, 27 December 2012 07:34:01 UTC-6, Tim Richardson wrote: > > With trunk (Version 2.4.1 alpha.2 (2012-12-26 11:54:07) using rocket > server on OS X, I'm trying something I've never done before: installing an > app from a url. The app I want to install is > https://github.com/mdipierro/web2py-book > I give it the application name 'book'. > > It fails with > Unable to install application "book" > > Python 2.7.3 > started with python web2py.py > --