Don’t count on it.
A friend of mine started a dot.com in Cali during the internet boom days called Model E.
It was a company that customized and leased a package of cars instead of just one. You could have a Corvette for a week and then an Escalade the next, and so on, throughout your lease period.
Anyway, Ford sued him and he lost. Too close to Model A and Model T for Ford.
All depends on who has the most money for lawyers.
I'd like to see him challenge "Phone Book." How about "Blue Book?" And, of course, there are MacBooks and NetBooks out there.
Not to mention ebook.com, which has been around a while ... not to mention the generic term "e-book."
He's gonna get spanked. He's not the first person to have used "book" in the way he says, and I believe that fails what is pretty much the opening threshold for that sort of trademark claim.