Danny Dunn and the Anti-Gravity Paint by Jay Williams and Raymond Abrashkin.
Illustrated by Ezra Jack Keats.
This is fiction for young adults, not usually the level of literature I seek out, but this has a nice vintage feel about it. It is a story of space travel, that was published in 1957, when the stars twinkled with promise for the future of mankind. Danny is a pretty regular kid who just happens to live under the same roof as Professor Bulfinch, who is conducting research into all sorts of things.
This was the first of fifteen books in the Danny Dunn series, which included other titles like Danny Dunn and the Smallifying Machine, and Danny Dunn, Invisible Boy. The 1963 movie Son of Flubber was, according to Wikipedia, loosely based upon Danny Dunn and the Anti-Gravity Paint. Grade: C
Whittlesey House/McGraw Hill 1957