"Bookshelf" is less about the peeping-Tom qualities of a good bookshelf book than unmitigated jealousy. It is by a British author who, his bio says, "runs the Shedworking website for homeowners with garden offices," a remarkable job that certainly warrants a book on the art of garden offices, whatever those might be. Instead Johnson stays true to "Bookshelf." It is 268 pages of inventive shelving. You will want to buy most of these — the Pac-Man shelf, the hollow arrow with room for one title — but most will require many frequent flier miles to purchase.