by FREDERICK BUECHNER 276 pages. Atheneum. $5.95.
As usual the substance of the book is Frederick Buechner's amiable conviction that the hound of heaven is a wet spaniel, apt to shake himself at any moment and shower a man with faith and grace. What is also unsettling, in this successful sequel to Buechner's Lion Country, is the considerable attention but negligible weight that this gifted and amusing writer gives to earthly matters.
The hero of Open Heart, for instance, a moony young teacher named Antonio Parr, runs up and down his emotional scales...