Over at UnBeige, mediabistro.com's design blog, Stephanie Murg reports that the design firm Pentagram has taken Decipher, "a small olive green book of 14 cryptograms" sent out as a holiday gift late last year, and turned it into a series of online puzzles. In the image above, for example, you've got to determine the missing letters that would satisfy the clue "midday nap."

They get harder.