Why do pirates love parrots? /

by Feldman, David, 1950-
New York : Collins, 2007
1st Collins paperback ed.

When do fish sleep? and other imponderables of everyday life /

by Feldman, David, 1950-
New York : Harper & Row, 1989
1st ed.

Why do clocks run clockwise? and other imponderables : mysteries of everyday life explained /

by Feldman, David, 1950-
New York : Harper & Row, 1987
First edition.

How does aspirin find a headache? : an imponderables book /

by Feldman, David, 1950-
New York : HarperCollins, 1993
1st ed.

Imponderables : the solution to the mysteries of everyday life /

by Feldman, David, 1950-
New York : W. Morrow, 1986
1st ed.