Doing a search for "!amazon kindle" prints the following:
malformed JSON string, neither array, object, number, string or atom, at
character offset 1 (before "<html>\n <head>\n...") at
/usr/local/share/perl/5.10.1/WWW/DuckDuckGo.pm line 91
Tue Mar 15 16:37:58 2016MOOLLAZA [...] cpan.org - Status changed from 'new' to 'resolved'