Explorer, Destination Brainby Seth McEvoy, Walter P. MartishiusExplorer · 128 pages · ISBN 9781596876040Amazon PrintBarnes & Noble
Explorer, Escape From Jupiterby Seth McEvoy, Walter P. MartishiusExplorer · 130 pages · ISBN 9781596876064Amazon PrintKindleBarnes & Noble
Explorer, Journey To The Center of the Atom!by Carol Gaskin, Walter P. MartishiusExplorer · 130 pages · ISBN 9781596876033Amazon PrintBarnes & Noble