This visually attractive treatment of the early Celtic folktale, in which Finn and his crafty wife foil the menacing giant, Cucullin, is musical in its wording and graced with a fine sprinkling of old Irish artifacts. Cucullin has it in for Finn, just as he has it in for every other giant in the land. As Finn and his wife, Oonagh, are wielders of faery magic—and Oonagh is also endowed with an uncommon store of quick wits—they set up a clever and humorous ruse that results in Cucullin losing his golden finger, the source of his ferocious strength, while Finn escapes being beaten into jelly. Byrd retells the tale with verve; his illustrations are elegant and fine-lined, decked with telling details of history and lore that not only spur interest in the proceedings but convey a palpable sense of the Celtic past. A synopsis of the MacCoul legend, source notes, and a pronunciation guide appear at the end of the book. (Picture book/folklore. 4-8)