These are sections 9 and 10, respectively, of the new Kindle book publication process, and are really the final things you need to take care of before clicking that “Save and Publish” button. Luckily, they don’t require much effort to take care of. Here they are:
What is Kindle MatchBook?
It’s Amazon’s way of encouraging people who have bought a paper copy of your book (if you offer one) to also buy the Kindle version. If they have already bought the paper copy, the ebook version will be cheaper for them than it would be otherwise (as MatchBook promotions need to be at least 50% lower than the regular digital price). It’s a good deal all around. The reader gets another copy of your book for cheaper than it would otherwise be. You, the author, get money from a sale that you probably wouldn’t have had. And Amazon gets to take its commission. Everybody wins.
I personally don’t have any paper versions of my books for sale, so I’ve never tried MatchBook. If I did, I think I would enroll the book in the MatchBook program because I don’t really see a downside.
There are more details about MatchBook on Amazon’s Kindle MatchBook FAQ page.
What is Kindle Book Lending?
Amazon says it best:
The Kindle Book Lending feature allows users to lend digital books they have purchased through the Kindle Store to their friends and family. Each book may be lent once for a duration of 14 days and will not be readable by the lender during the loan period. Lending is only available for Kindle books purchased on Amazon.com.
All KDP books are automatically enrolled in the Book Lending program (which is not to be confused with Kindle Owners’ Lending Library). It can only be opted out of if you have chosen the 35% royalty option. Even if I did have the option to opt out, I don’t think I would. I personally don’t know a single person who has ever loaned or borrowed a book this way, so it’s not like enrolling your book here would equate to massive lost royalties. I think that most Kindle owners don’t realize that book lending is even an option. On top of that, I don’t like the idea of creating frustration or ill will aimed at me if a person did want to share my book but was unable to do so.
More information and FAQ can be found on the Lending for Kindle page (which is also where the above quote is from).