Mr. Penumbra's 24-Hour Bookstore by Robin Sloan Digest & ReviewClay Jannon, a young artist and recent college graduate, recently fell into unemployment. Passing up one 'Help Wanted' sign after another along the streets of San Francisco, he finally comes across Mr. Penumbra's advertisement looking for a night clerk for his 24-hour bookstore. Clay's interest in typography and a particular fantasy series leads him on an exciting adventure between the physical and digital worlds. Within Mr. Penumb