I see that there are five books that have been reviewed by five or more Library Thing users –  Harry Potter and the Half-Blood Prince, The Da Vinci Code, Jonathan Strange & Mr Norrell, Eats, shoots & leaves, and The time traveler’s wife. But only one Library Thing user has in fact reviewed all five.

(Actually I suspect I may well have put more review links than any other user. Though on close examination I may have duplicated some of them.)