by Raymond Abrashkin and Jay Williams

Danny Dunn is the name of a fictional character and protagonist of a series of juvenile science fiction/adventure books
written by Raymond Abrashkin and Jay Williams in the 1950s, 1960s, and 1970s. The stories were set in the fictional
American town of Midston.  Raymond Abrashkin suffered from paralysis, and died after the fifth book.

Note that hardcover titles in the series have different series numbers than the paperback titles