Indianapolis: Bobbs-Merrill. (l947). lst Ed. B/w illus. with green accents by the author. Sm.4to. 134p. Blue cloth. Lt.wear extremities, else neare Fine in tattered d/j. 
Augustus and family are traveling around the USA in their trailer and stop in Teaxs along the
Rio Grande. The information of the back of Augustus Rides the Border (1947). Lists 10 books not including
the Border title.
Checking on line I only find 1 more later title:
Augustus and the Desert. (1948).
Making a total of 12 titles.