The Edison MysteryBook - 2001
Thirteen-year-old Robert "Qwerty" Stevens uses the time machine he finds in his back yard to visit Thomas Edison's workshop in 1879, and there helps develop the electric light bulb, but then needs his sister's help to return to his own time.
Publisher: New York : Simon & Schuster Books for Young Readers, c2001
Edition: 1st ed
Characteristics: 201 p. : ill. ; 22 cm