Nihil obstat imprimatur is a familiar phrase to anyone who has read a lot of Catholic literature. Basically, it reflects that assessment of the church book censor--honestly! the "censor librorum"--that "nothing should get in the way" of it being published, followed by the bishop's command, "let it be printed." Of course, as this Catholic review of the marks indicates, even then the faithful need to be discerning.
Which brings us to the evangelical mark that adorns the book listing above. "Please Read With Discernment" is a trademark of Lifeway Christian Stores, and it indicates that the book in question may not toe the doctrinal line. The Friendly Atheist rounds up revelatory links & responses.