After aquiring a bookcase of various "how to's" and "all abouts" for many subjects, I found many a waste of time and started to be picky. I need to preview a book before I buy it anymore.
Sealed books stay at the store unless there is open copy to look at. Mostly the title pages, flipping for photo and diagram inclusions, and a peak at the index lets me know if it suits me. Boarders used to let me open a copy I might be interested in. I bought more than half of those too. But that stopped so I haven't bought any in more than a decade now.
