Danny Dunn and the Smallifying Machine

Danny Dunn and the Smallifying Machine is the eleventh 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 1969.

Summary
Professor Bullfinch has created a machine for the government which will shrink objects and be used for spying. When Danny sneaks into the lab, he and his friends discover the machine and try to use it for a problem they have been dealing with at school.

Editions
McGraw-Hill
 * Paperback, 1969, illustrated by Paul Sagsoorian
 * Hardback, 1969, illustrated by Paul Sagsoorian

MacDonald and Jane's
 * Hardback, 1970, illustrated by Barbara Swiderska

Archway Books
 * Paperback, 1971, #1 in their series

Pocket Books
 * Paperback, 1983 reissue, illustrated by Paul Sagsoorian