The book was published in 2010. And for a 13 year old book it certainly feels old. This is a compilation of short articles written by several people. And they generally do a good job of articulating their thoughts, but I cannot say it's full of gems, or anything. There is obviously some good advice. After all they are all experienced people with a good understanding of the field. But there are also sentences like "Do not only measure test coverage, but automatically check the results, too. Again, break the build if test coverage is too low." or "Have a regular code review day each week. Spend a couple of hours in a review meeting." So... I think it makes good light reading. You can read a single of these 97 "things" in a couple of minutes. But I wouldn't keep my hopes very high.
BTW: The book is available in GitHub: https://github.com/97-things/97-things-every-programmer-should-know