The more books there are on shelves, the more will be sold. Once you get to the level of The Secret and have 40-100 copies in many stores, managers have almost no choice but to put them in prime real estate like front-of-store, end caps, or front window.
I used Evernote almost exclusively for researching 'The 4-Hour Body.' I was able to eliminate all of the perpetually open tabs and multiple bookmarking services. It's also all automatically backed up to Evernote, which gives me peace of mind.