If you are after a comprehensive book that outlines qualitative research I would highly recommend this. Detailed postgraduate level, although very understandable. Interesting case studies from many disciplines. The one I found most memorable was a study searching through people’s rubbish and this found that in America poorer people buy branded smaller packets whereas richer people buy non-branded larger packets.

book review
Unfu*k Yourself: Get Out of Your Head and Into Your Life by Gary John Bishop
You speak to yourself more than anybody else. Your thoughts impact on your actions. Rather than thinking you should do things take a deliberate decision