Ostensibly an A-to-Z encyclopedia of all known sports, many sports are never mentioned. There's not a word about rugby, volleyball, roller derby, swimming, or (shockingly) Basque pelota or shinty. There is a chapter about sliding, but none about skiing. Competitive eating and rhythmic gymnastics will have to wait for another book.
However, there are roughly eight chapters about tackle football - "the greatest sport in the world, and everyone knows it" - and a good four or five about horse racing. So quit complaining before you've even heard the book. There will be plenty of time for complaining after you've finished it.
Those sports that are covered in the book are examined with exhaustive inattention to unretained detail. Many chapters have nothing to do with sports. For instance, the chapter on hunting is about hunting for a hassle-free, triple-tall Americano, light on the water.
So, then, what exactly is An Incomplete and Inaccurate History of Sport? Part nostalgic memoir (like the summer Mark Sansaver hit 843 home runs in backyard wiffleball), part Dave Barry-esque riffs (like explaining bocce to non-Italians), part scholarly tract (it includes the origins of tackle football), and part metafiction (see "Time-outs"), it is what Kenny calls his anti-coffee-table book.