Danny Dunn Scientific Detective

Danny Dunn Scientific Detective is the fourteenth novel in the "Danny Dunn" series of juvenile science fiction/adventure books written by Raymond Abrashkin and Jay Williams. The book was first published in 1976.
Plot introduction.
Professor Bullfinch and Doctor Grimes are working on more scientific ways to fight crime. Danny is facing an issue at school and needs to borrow the equipment to solve the school mystery.
Editions.
McGraw-Hill
MacDonald and Jane's
Archway Books
Pocket Books