I think it is possible to buy mostly good books with a bit of discretion.
Of the 130 books reviewed on CW I have only 52. BUT - I have all five of the five-stars, all but 4 of the 21 four-and-a-half stars, and half of the 38 four stars.
More importantly, I have just one of those rated less than 3 stars. That too is a gift from a dear Australian friend who keeps on sending me books on Bradman
Cricket books are expensive, particularly when new, and there is a lot of very bad work along with some great stuff. If one is not taken in by the celebrity-value of the author or the attraction of the book title, one can make very good choices and spend money very wisely.
The average rating of the 52 books of mine, which are rated on CW is over four and I have no doubt that if all the 500 or so books I have were rated here, the average would be higher.
So my advise to people starting cricket libraries is - use your discretion and if you are not familiar with the good writers on the game - ask. CW reviews are a good place to pick up hints on what to buy. That I think is the greatest service CW is doing to cricket lovers. I hope it is being used by many.