X-link to the DRM-free megathread:
New
Humble School's Out Bundle presented by No Starch Press is not for comics, but does contain at the basic level a cartoony illustrated guide to the periodic table, and also
The Manga Guide to Databases, which is Exactly What It Says In The Title, translated from Japanese university-level works. I highly recommend the series, which I own in paperback. They might possibly add another to the more-than-average level later, as they did in the previous No Starch bundle.
However, if you're into LEGOŽ or DIY computer programming for beginners, or know some kiddies who would benefit from newbie-friendly guides for such, the rest of the bundle should be well worth it.