Pat Pflieger: 2 books

Some houses are bigger than they look! Max has a problem:  he's the new kid in school, and nobody wants to be friends.  Until Ran invites him home. And that changes Max's life. Because Ran has a secret:  his family has a time machine.  And his uncle is lost somewhere in time. So...

The night the Bloody Mother took over, all the children in the City woke at the same instant ...   Since her soldier parents went to fight in the war, Janira Pangborn's life has changed again and again.  First she went to live with her grandfather in the city where her father grew...