If there were more jokes for your money, it would probably have gotten a “recommended” rating, but hard-back books aren’t cheap, and there’s only 20 jokes in the whole books (though I believe technically they’re actually riddles).  Most of them are really quite clever, but there are a few duds that fall flat, so you’re pretty much looking at $1 per joke.  Also, I disagree with the publishers as to the reading level & interest level.  They declare it to be a K-1 reading level, and a PreK-2 interest level; though jokes and riddles appeal to all ages, they must know some very advanced kindergartners — I feel it’s more like a 2nd grade reading level, and likely to appeal to students up to grade 5.