I loved "The Final Quest." This could be on the same level if you cut three quarters of it.
Every Christian should know the basic teachings presented in this book:
That Christianity is about Jesus first and last,
that God is here as much as he is in heaven,
that the things that the young (or those close to us) share can be as good as the teachings of the greats,
that it's good to ask tough questions,
that it's OK to be flawed,
that all our questions have answers,
that we should be careful not to slavishly imitate everything about the greats of the Bible,
that we can (must) frankly admit it when we don't have the answers to other people's questions,
that most of the people leading the church are as bad off as the followers (or worse off)
The fact that this stuff is so massively revelatory to so many is proof of the main point of the book: Nearly all of the Body of Christ is in very, very bad shape — in no way ready for the storm that is about to strike.
I would challenge Br. Joyner to submit his next work to a ruthless editor who is not impressed by his near-legendary status before he publishes. With such an editor's help he definitely could write another enduring classic.