Pensum Pro is a new serif typeface family by Nils Thomsen (of Typemates) that he describes as being designed “for text, text, and nothing but text.” It includes 18 fonts in 9 weights — from thin to black, plus italics — and it's designed to work well at any size:

The strong serifs combined with low contrast makes it excellent for long reading text e.g. in magazines and books. The extreme thin and fragile styles can give a stylish and fashionable look, while the strong black weights are great for the rough nature of mountain sports. The excellently and nicely balanced contrast helps Pensum to work great in very small sizes, because of the ink-trap effect. On the other hand this contrast looks impressive in large headlines and italic quotes!

Although Typemates are still working on getting their online store up and running, Pensum Pro is available for purchase now through these resellers: MyFonts, Fontspring, and YouWorkForThem. In each case, the font family is half-off for a limited time (as of May 23rd, 2016, and likely ending in mid- to late-June 2016).