The Humble BOOM! Bundle is in its final day, meaning readers still have time to download 39 issues of DRM-free digital comics for as little as a penny.

That will get you issues of such BOOM! Studios series as Sons of Anarchy, Day Men, RoboCop and Imagine Agents. Those who pay more than the average amount offered (right now that's $10.10) will unlock issues from 10 more series, including Planet of the Apes, The Woods and Mouse Guard: The Black Axe (the offering has expanded since the launch of the promotion, adding Fairy Quest: Outlaws, Polarity, Suicide Risk Vols. 1-2 and Protocol: Orphans).

Readers paying $15 or more also get Bravest Warriors, Bee and PuppyCat, Lumberjanes and The Midas Flesh. All together, that's more than 100 issues.

As with all Humble Bundles, a portion of proceeds go to charity -- in this case, it's the Comic Book Legal Defense Fund. The promotion ends Wednesday at 11 a.m. PT.