I rarely post books on this thread because I just don't know much about children's books. I feel comfortable posting this series of children's books, however, because they were around when I was a child.
The series is made up of Dr. Seuss books. Random House and/or Amazon have dropped the prices of a large number (24, if I counted correctly) of them, in the Kindle mobi format, to only
$1.99. I think that this represents 50% of the regular Kindle selling price of each one.
One way to find the ones priced
$1.99 is to follow
this link, in which Random House's books by Dr. Seuss are sorted by price, low to high.