Captain Picard's edition of Ulysses.
Ulysses was a novel written by James Joyce, possibly the most famous of Irish writers. The book describes the day of a resident of Dublin and the sights he sees therein. The book was famed for being written in a difficult to understand manner. (ENT: "Shuttlepod One"; TNG: "Captain's Holiday")
In late 2151 Malcolm Reed to a copy of Ulysses with him on a trip with Shuttlepod 1 that he planned to read on the return trip to the Enterprise (NX-01). Commander Trip Tucker remarked that he'd "rather realign every micro-circuit on this shuttle than try to wade through that baby". (ENT: "Shuttlepod One")
In 2366, Captain Jean Luc Picard took hardcover editions of Ulysses and Ethics, Sophistry and the Alternate Universe with him on his vacation to Risa. Commander William T. Riker disagreed with the Captain in this instance as he didn't think of those books as "light reading". (TNG: "Captain's Holiday")