Google Books: Search results in scrollbar

Google added a new search feature in Google Books: search results in your scrollbar. Now when you search in a book, little hints will appear in the margin to indicate where you results are located. When you hover over one of these annotations, you'll get a quick preview of the search results and the option of jumping directly to the associated page. Now there is a strong visual display of result locations, and often clusters will form around particular chapters or passages. This will help you navigate more easily between pages which contain your search term.