The Kanji de Manga, or literally Kanji in Manga, is a series which “teaches you how to read and write Japanese.”
The series does well in print and as digital content on the Kindle platform.
This is a really fun and simple way to brush up or to become acquainted with some new kanji. There is also a special edition for yojijukugo 四字熟語 or four character sayings, although the digital copy is not very good for this edition.
The example below shows a typical page in the series.
I own three editions, one of which is the 四字熟語。