Abraham Lincoln's Doctor's Dog

So I going through a couple of best-sellers list looking for something new to read because I'm bored. I noticed that a crap ton of the books up there are basically clones of the Da Vinci Code. It was an ok book and it was ridiculously popular for some reason, but that doesn't explain why there are at least 4 or 5 books on each list with basically the same plot. If I was writing a book now I would just ad in some bullshit about Vatican conspiracies and secrets in Renaissance art just so it would sell more. Cus I gots to get paid. I think this is just the 00's (or naughty oughties if you will) version of all the grey alien and government cover up crap from the 90's/