SLEEPING BEAUTY by ROSS MACDONALD 271 pages. Knopf. $5.95.
Sneaky question for a book reviewer who complains that Ross Macdonald has written the same Lew Archer detective story 19 times in a row: "How do you know, O sage?"
Answer: I know because I read them.
Sneaky Question: You read them, I take it, in the line of professional duty?
A.: Well, I have to keep up . . .
S.Q.: That's very conscientious.
A.: All right, all right. I read Macdonald because I like him.
S.Q.: No more questions.
A.: Oh yes, there are...