Home • Authors • More by Robin Sloan Mr. Penumbra's 24-Hour Bookstore by Robin Sloan ★★★★☆ 4/5 My review Goodreads ↗ No review yet. Published 2012 Pages 288 Series Mr. Penumbra's 24-Hour Bookstore #2012 Owned No ISBN-13 9780374214913 Read on Jan 14, 2013