It is mainly about evolution (as mentioned above) having no ultimate purpose
or direction. Thus implying the big guy (God), making those precise
Watches, went about it in a blind way.

So I guess the God Delusion would be the next fit.

Dawkins is a Brit who pulls no punches.
He will tell you how he feels and more.
His American atheist audience is huge.

Stephen J. Gould and Dawkins both excellent writers
on evolution. Gould did not try to rile quite as much.
RIP. Gould was one of my all time favorites. A harder
read than Asimov, but very good.

I gotta go with something Historical. The Adams book sounds
good.