The answer for most atheists will be: I’m not going to read the book because I don’t care. Most atheists aren’t of the driven kind that give all the speeches and make all the headlines, we just aren’t into the whole God thing, it’s an avenue of interacting to the world that we can’t relate to. And then we see the weird (at least to us) stuff religious people obsess on (like the current thread here on why Mary’s sins didn’t transfer to Jesus), and we’re glad we’re not in that club. You guys think about things that just don’t rate for us, and I’m sure we think about things that don’t rate for you. And yeah, if you use an ridiculously broad definition of the word “faith” we have “faith” in a lot of stuff, but that’s more the definition your using than actual faith. It’s really more just assumptive behavior, we all assume (”faith”) when we go to bed at night we’ll wake up in the morning, doesn’t mean we have a God concept, just means if you honestly didn’t think you’d wake up on the morning nobody would ever go to bed.
What you describe isn’t atheism, its apatheism (ie. apathy toward the question of God and religion.)
Of course many of the things that religion does seem silly and even ridiculous, but in the end religion is largely meaningless. Its a convenient way to unify believers, but other than that it can never formulate or maintain a personal relationship with God (which is necessary for salvation.)
Further, even when the definition of faith is broadened, even atheists have faith that there is no God without any evidence to support this, an example of an argumentum e silentio fallacy.
If you wanted to exercise no or little faith, you’d be an agnostic and declare that you have no faith there is a God or there isn’t.