Among the best of the Challenge Books so far, this points the way to a social adventure and in its elaboration of the elements involved in making the Rhone River of France a more productive area, it makes an often absorbing story. First and foremost a profile of the river, the account begins in the Alps where the Rhone is born of a glacier and rushes in a torrent down to Lake Geneva. As a vehicle for further information, a journey south from Lyons by an oil barge takes the reader not only to the famous historical sites along the way but into the life of the river itself. Most fascinating perhaps is the description of the Camargue and its people- the filled in swampy area that used to be a bay below Arles and the ranchers and rice growers whose ways are similar to American ones in many respects. Though in sum the estimate of the Rhone and the industry and farming of its valley is full of problems of weather, drought and conservation, the big efforts France is making to restore the area have their encouraging aspects. Fine supplementary reading.