The humpbacked fluteplayer
Sharman Apt Russell
While on a school field trip, May and Evan find themselves transported back in time and made slaves by one of the warring Indian tribes who lived in the Arizona desert long ago.

by Penelope Lively (1981)
When positively uncanny things begin happening in the new housing development, Tim and his grandfather realize they must do something to stop them.
Sharman Apt Russell
While on a school field trip, May and Evan find themselves transported back in time and made slaves by one of the warring Indian tribes who lived in the Arizona desert long ago.
Anne Lindbergh
Ten-year-old August Brown adjusts to his new home in Washington, D.C., with the help of the seven children of Pineapple Place, invisible to everyone but him.