Books to heat you up

Finished The Overlook by Michael Connolly. Felt let down. Wondered why.
Read an explanation in the back of the book that said he originally wrote the story as a serialisation for a newspaper. It ended up as 48,000 words, and then when he decided to turn it into a book, it gave him the freedom to add stuff and deepen the story.
Sorry, Mr Connolly. Didn't work. Should have left it as a serialisation and then I wouldn't have paid $29.95 for it and felt ripped off.
I went back and checked a couple of his earlier books (because I can get really picky about sentence stuff) - in The Overlook, hardly any sentence has a comma in it. Not necessarily because they are all simple sentences, but because nobody put commas in where there could have been a few. In earlier books, not only are there commas (correctly) but the sentences are more meaty and have more impact on the style. Was this comma-less writing from the author, or the editor?
Will I ever know? (I'll stop being pedantic now, but this stuff impacts on style and substance so much that you can't really ignore it.)
On the other hand, I'm now reading the new Janet Evanovich - Lean, Mean Thirteen - and loving it. Must have laughed out loud six times already. Great winter reading, and lots in the story to warm you up (not the least of which is Ranger).