As a clerk in a library, I would go through the new books list and put a hold on every title in a few categories so I could read (or at least flip through) them and make a a quick review. Some had new ideas and I would check them out for further reading. Many, if not most, were filler and a couple of common ideas.

Should you read a few? Yes. Use your library first though, because most are not worth the time and money. Search the topic(s) you want and make a list (better if you put them on hold, then the books will all be waiting for you!), flip through them and read a few paragraphs to see if you like the style. Sometimes you can just read the chapter headings and get all the good stuff in one go! If you happen to find a book that helps you, then sure, go ahead and buy it. Going back and re-reading it months or years later can help refresh the info and put you back on track. I own The One Minute Manager because while the ideas are simple I need to remind myself every year or so to actively use the good ideas!