Most important in terms of fiction I like is style and characterizations. I'm not fond of "low" styles of popular fiction with head-hopping, book-saidisms and other awkward writing gremlins, but neither am I fond of "high" post-modernistic styles such as stream-of-consciousness, refusal to use quotation marks and other artificial literary pretentiousness--yet I'm capable of enjoying a novel written entirely in second person. Go figure. Give me a character to root for, I can get through dark material--after all The Color Purple and The Kite Runner are favorites of mine--but if I basically dislike every character, especially the protagonist, I'm not going to make it through hundreds of pages. So yes, expect me to rate some literary masterpieces low and some cheesy but fun books high.
I was predisposed to like this book. It's set in New York City's Museum of Natural History. I'm a New York City native who lives within walking distance of the museum; it has been a favorite place since childhood--so I got a kick out of the descriptions of the museum's rooms and of the neighborhood. This one is also as much science fiction as horror. It doesn't have the mind-blowing or thought-provoking quality of the best of that genre, and I have no idea how plausible is the science in the book, but I did like that the underpinnings of the "museum beast" wasn't supernatural. The book ended with a good twist too. Don't look for depth here--the style and characters aren't anything special--I can't see this as a keeper I'd ever want to read again. But it was very entertaining and if you need to pass some hours on a plane or train this would make a good pick. I particularly liked the Sherlock Holmes-like Agent Pendergast who is a recurring character in other books by this author. There is a direct sequel to this book as well--Reliquary.