Bookerly
Bookerly is a serif typeface designed by Dalton Maag as an exclusive font for reading on Amazon's Kindle devices and apps. Combined with a new typesetting engine, Amazon.com asserts that the font helps the user "read faster with less eyestrain." The font includes ligatures and kerning pairs. Bookerly replaced Caecilia as the default font for the 2015 Kindle Paperwhite (3rd generation) and it has been used as the default font on Amazon's following e-readers. The Bookerly font was added to many of the older Kindle devices via firmware updates.