Hi all. Domain registration help?

My wife is writing a book. As she's now firm on the name I'm looking at registering a domain name or two. ( her book does contain sensitive and controversial content which will like being under fire / censored).

And hints/ tips / what to look out for etc. Will be appreciated. 

Best secure private domain registration service? 

And then, any recommendations for secure website hosting ? 

Reasonable costs of course.