Or maybe not.

https://www.amazon.com/dp/B005OMBTKY/
The kindle edition is free (as I write this), but I do not know how long it will remain free.
I haven't read it and the odds are slim (but not zero) that I'll ever read it. Unless of course its contents become a matter of discussion here.
The reason I bought it (for free), aside from the charming title, is that some time ago I started collecting free kindle books from amazon just for the fun of it, without the expectation that I would ever read any of them, although I have in fact read some of them. Perhaps similarly to collecting bottle caps, sometimes the fun is merely in the collecting.
I now have almost 130,000 free kindle ebooks from amazon (with a corresponding email invoice for each one as proof of ownership). My goal now is to discover if it's possible to collect one million of them. I am curious to know if anyone has already done that.
As a result of this hobby, I have noticed something peculiar. Or maybe not.
First, some background to set the context for my conjecture below. On the product page for a free kindle book, there is sometimes a list of recommended books based on what other people have bought or viewed. Sometimes the list of recommendations can be 100 books long. Sometimes some of those recommendations are also free. If you click on one of those recommendations it will take you to the product page where you can buy it, and often there is another list of recommendations, not necessarily the same as the one you just came from.
So here's my conjecture, based on random (and unscientific) observations:
- Starting from any free kindle book of any genre you like, and if you follow the links of recommendations for the free books, then on average, after buying all the free ones going six levels deep, you will have got a free kindle book about knitting. Or gay porn. One or the other.
Think of that as the six degrees of separation idea as applied to free kindle books, if you like.