Will there be a new holy servant?
Yes, but that doesn’t mean you’ll see him in the fourth book.
Will Christian ever find out about what Angelica did?
I’m assuming you’re talking about Angelica making a deal with the twins to give them information on the God Squad in exchange for saving her brother’s life. If so, Christian already knows, but there’s nothing he can do to change it.
Will Christian find out about Wendy's massive crush on him, or does he already knows and doesn't want to hurt her feelings?
Yes, he’ll find out and you’ll never believe what he does about it.
Will Christian do something really stupid, by which I mean keep trying to get Fallon?
Christian won’t try to go after Fallon, but he’s never going to get over the draw he feels toward her. Fallon is the succubus of Satan. The power she has over the opposite sex makes her impossible to resist, no matter how strong minded a man is.
Will the triad stay together forever?
Yes, they will. Their bodies and souls are connected. If one dies, the other two will follow.
What actually happened between Simeon, and Mrs. Robinson?
There’s no kind way to say this. Simeon allowed her to seduce him and yes he did sleep with her. However, it was strictly physical. Those of you who’ve read In the Beginning know that his heart belongs only to Lucy Griffin.