RAIN ON THE WIND (312 pp.]Walter MackenMacmillan ($3).
The rich Celtic twilight of William Butler Yeats and J. M. Synge has long since faded, but their disciples are still lighting little peat fires on the general bog of contemporary Irish literature. The latest of these, a novel by Walter Macken called Rain on the Wind, never quite bursts into flame; the book carries so much sentimental moisture that it douses its own glim.
Yet for pages together, it smolders with a pleasant aroma of the ould sod.
The hero, Mico Mor, is a broth of a fisherman's boy in County Galway no champ...