Sibley The Back of the Bus by Aaron Reynolds

 It is December 1, 1955 in Montgomery, Alabama. A boy and his mother ride the bus. They are sitting where  they're supposed to sit- in the back. The boy enjoys rolling his  shiny marble on the grooves of the floor, which rolls up and down the bus. The bus makes a stop letting people on and off. There is a sudden commotion in the front. The bus driver tells someone in  front that  they have to move or he would call the police.It's Mrs. Rosa Parks!! 
  The story is told through  a young boy's eyes. With great text and illustrations, this story commemorates Rosa Parks' act of defiance that changed the nation.