I am reading the above title (Philip Gucker, Dover Press, 1966). In the section on adverbs, he writes, "'Good' and 'well' should be carefuly differentiated. 'Good' is always an adjective. 'Well' is usually an adverb; but it is used as an adjective for certain meanings--attractive, satisfactory, in good health..."

He goes on to give several examples. In one among them, "Mrs. Klein looks *well* in that dress," he suggests "well" functions as an adjective. I would have thought its function was adverbial. Am I daft, or is he mistaken?