Fans of a host of favorite authors will be glad to see their books being reissued this spring and summer. Tor Seidler's The Dulcimer Boy, originally published in 1979, is back with elegant half-tone illustrations by Brian Selznick. Opposite the title page, a detailed portrait introduces the two orphaned babies left at the door of their uncle, Eustace Carbuncle, Esq., with a caption: ""William has the brown hair and Jules the gold."" Other drawings depict milestones in the tale, such as William's discovery of the silver-stringed dulcimer in the antique mahogany secretary on the landing at the top of the stairs-a discovery that leads him and his brother to solve the mystery of their past. A handsome presentation of Seidler's eloquent tale of finding one's place in the world.