Simplify the following text for a Grade 5 native English-speaking person.
Original: Many years later , when Max is in middle school , he finds out that Freak and his mother , Gwen ( referred to as `` The Fair Gwen '' , `` The Fair Guinevere '' or `` The Fair Gwen Of Air '' after King Arthur 's wife ) are moving into the house next door .
Simplified: Max finds out that people are moving into the house next door . The new neighbors turn out to be Freak and his mother Gwen , who Freak calls `` The Fair Gwen '' after King Arthur 's wife .