Did you know that Postgenomic, NPG’s website that collects posts from hundreds of science blogs and then does useful and interesting things with that data, also tracks books about science? I’ve made a bookmark to this page: Postgenomic – Books lists books by “popularity”, but you can also sort by publication date or date added to Postgenomic (the date of the blog post about the book). Each book listed on the Postgenomic page comes with a set of keywords, which are also searchable, either within the books category or within scientific papers. (There are some handy tabs across the top of the Postgenomic page to allow easy switching between these different types of publication.)
At time of writing this post (a few days before it appears on Nautilus, as I’m away for a couple of days), the most blogged about books are about religion and climate — but not both together. Use RSS to subscribe to Postgenomic (books, papers, blogs or any combination, by your own keywords) to track the trends for yourself, according to your own interests.