Having seen the entire TV series without ever reading the books, I decided to take a stab (pun intended) at this series to see the genesis of the Dexter character, learn how they adapted the story line, and of course, hopefully read a good book.
Up until about half way through this first book, the TV series not only adapted the story as written, but lifted it almost exactly as it happened. The latter half, especially the ending, was a far less literal adaptation but it was clear to me (and will be to you if you watched the series as to how they adapted the story).
I think one of the greatest challenges for me after having seen what was a terrific series (except for the finale which almost blew the entire series (for me, from a story telling perspective) was whether or not the writing could hold my attention feeling like I might be able to predict what might happen. In the end, especially the very end of the book, I have to say that I enjoyed reading this and will at least check out the next one.
I think where Lindsay succeeds most is his ability to weave the dark side of the Dexter Morgan character through what Melissa Niksic of the Vine voice states, "a blend of dark humor, intense drama, mystery and suspense, and good old-fashioned blood and gore." I think this particular balance helps the book flow quite easily, keeps the reader at a high level of engagement and keeps the story fresh.
I look forward to the next book, "Dearly Devoted Dexter" sometime up the road.