JOURNEY TO THE FAR AMAZON (353 pp.) Alain Gheerbrant Simon & Schusfer ($5).
THE VOYAGE OF THE HERETIQUE (214 pp.)Alain BombardSimon & Schusfer ($3.50).
One of the hallmarks of a Frenchman supposedly is le bon senscommon sense. But two Frenchmen have put out books about experiences that belie the national characteristic. One decided to penetrate the Amazonian jungle and make friends with cannibals. The other proposed crossing the Atlantic alone in a 15-ft. dinghy fitted with a single tiny sail. Both were displaying uncommon sense, which is the kind that turns...