Anna Claybourne 
100 Most Disgusting Things on the Planet [PDF ebook] 

100 Most Disgusting Things on the Planet is divided into a range of categories, from disgusting animals, plants, and other creatures to disgusting foods, disgusting inventions, and of course a selection of revolting human body bits such as snot, scabs and earwax.
Each page includes a »revoltingness rating» and intriguing description of the disgusting topic in question, along with stunning photographs and diagrams. Side boxes and a science section on every page give extra angles and valuable educational insights into the most disgusting things our world has to offer.