Slab serif typeface Museo Slab looks up-to-date and rock-solid at the same time. The regular and Italic 500 versions are free, and many other weight are available for purchase.

His Comic Serif is a (PostScript) OpenType font that’s an interesting alternative if you want to stick with the comic book theme. The slab serif letters are drawn monoline, but with a fun, easy ...

Not only was Ron able to deduce the name of the font, but it turns out that Google actually shipped four fonts with keep, all under the moniker Roboto Slab (thin, light, regular, and bold).