While looking for something else, I uncovered a slew of $0.00 (that's _free_, for those, like me, who are mathematically-challenged) Kindle ebooks. How many are there? Well, I gave up looking after three pages.
Most of these are in the sci-fi, romance, and mystery/thriller subgenres.
A lot of the books have Whispersync companions. All of the ones that I checked are $7.49. I don't consider $7.49 a particularly good deal for a WS deal, but some of the ebooks have quite a lot of pages, enhancing the value of the WS deals, in my view.
All of the ebooks that I saw were rated 4 stars or more.
https://www.amazon.com/Transmission-Invasion-Chronicles-Book-One-Thriller-ebook/dp/B07D4PMZ42/ref=mp_s_a_1_1?ie=UTF8&qid=1538055077&sr=1-1&pi=AC_SX236_SY340_FMwebp_QL65&keywords="chronicl  e+books"&dpPl=1&dpID=41arr0ZP%2BXL&ref=plSrch
GtrsRGr8 is not really posting this. I hacked into his account and am _pretending_ to be him. GtrsRGr8 wouldn't be caught dead posting fiction books. 
