Another very funny story about that engaging young fellow, Danny Dunn, and the adventures he attracts without even trying.

It starts the day Professor Bullfinch leaves for Washington and entrusts Danny with the care of his semi-portable computer. Impetuous Danny gets the bright idea of using the computer to do his homework. To salve his conscience and those of his two companions—Irene Miller, the new girl next door, and his old friend Joe—he reasons that the long way of working things out with paper and pencil is old-fashioned.

As might be expected, Mrs. Dunn and the teacher, Miss Arnold, do not go along with this theory. And when these two put their heads together, Danny's troubles really begin.

Ezra Jack Keats' illustrations project the same spirit of fun in this third hilarious story of a boy who often rues his actions because he jumps too quickly to conclusions.

From the dust jacket