Sun and the Moon

This is the second book in The Sun and The Moon series
We last left Felix trying to get home but found himself trapped in Alicade, he went to gain his last power of Earth to finally become a full mod avatar.
What's changed?
What's happened in the time he's been gone?
Will they take him back with open arms or will they reject him?
Are there any leads on Annadora? Baltazar?
So many questions to be answered.....