Colour illustration of Janet and John running , saying 'Good-bye! Good-bye!', with a merry-go-round in the background from Janet and John, Book One written by Mabel O'Donnell, Rona Munro, Muriel Warwick and illustrated by Florence and Margaret Hoopes. Janet and John are the main characters in a series of reading books for children aged 4?7 years which began in 1949.