Instruct: Classify a review into positive or negative sentiment.
Query: Obsoleted by sequel

Almost all of the content in "Late-Talking Children" is repeated in the sequel, "The Einstein Syndrome: Bright Children Who Talk Late". In reading these books back to back, I feel that the latter is really just a 2nd edition of the former despite the title change. I strongly recommend instead the "The Einstein Syndrome" published by the same author a few years later.