Moe books -another kind of information manga
Moe (萌え, pronounced mo-e) is a concept signifying attraction to or love for cute characters. These characters needn't be from a manga or anime: one can also feel moe for, or 'moeru', a charming young attendant in one of Akihabara's famous maid cafés, an illustration of a cute character like there are so many to be found on all kinds of objects in Japan, a figurine, and so forth.
It shouldn't be a surprise that 'moe' characters are now used to draw the attention of their admirers to other subjects, just as famous manga characters sometimes pop up in information manga to instruct readers in subjects they might not otherwise be interested in. Comipress (fast becoming a favourite resource here) reports on several new moe books that use cute characters to introduce readers to English, economics, stock trading, shogi (a board game), and Linux. The books aren't actually drawn in manga format, but amply illustrated with images of various cute girls (see the shogi and Linux posts for page examples. The Linux one, while apparently innocent by itself, is described on AkibaBlog -whose surrounding advertising renders the link decidedly not work safe).