Last night, I pre-ordered a paper book from Amazon. I did not want to do this. I wanted the Kindle version. However, the Kindle version of this particular book is slated for release on October 15, whereas the paper version comes out October 1. I need to read the book before October 15, so I find myself in enough of a rhubarb of a pickle of a jam that, for the first time in a long, long time, I bought a paper book. Again, I did not want to do this. Relief may soon be in sight, however, as Amazon is rolling out a service called Kindle MatchBook in October. The premise is simple: Buy a paper book from Amazon, and you can have the Kindle version for $3, $2, $1 or free, depending on the title. This includes books you’ve purchased from Amazon “all the way back to 1995—when Amazon first opened its online bookstore,” according to the company’s press release. It’s retroactive, in other words.