Book reviews and bestsellers

This week: the man who saved the Internet, and anthology of female crime writers, and the cloistered life of nuns

<p>38-year-old homeless tour guide Karim stands at the Prague&#8217;s main railway station during his tour in Prague November 20, 2012. Karim works for a student-run tour agency Pragulic as a tour guide that shows tourists the sides of Prague that sightseers would normally avoid.  Picture taken November 20, 2012.  To match CZECH-HOMELESS/TOUR  REUTERS/Petr Josek (CZECH REPUBLIC &#8211; Tags: SOCIETY POVERTY TRAVEL)</p>

38-year-old homeless tour guide Karim stands at the Prague’s main railway station during his tour in Prague November 20, 2012. Karim works for a student-run tour agency Pragulic as a tour guide that shows tourists the sides of Prague that sightseers would normally avoid. Picture taken November 20, 2012. To match CZECH-HOMELESS/TOUR REUTERS/Petr Josek (CZECH REPUBLIC – Tags: SOCIETY POVERTY TRAVEL)