TITLE: Functional equation book for olympiad
QUESTION [6 upvotes]: what may be the good suggestions in olympiad  functional equations for a beginner for . I have heard of this book by B.J.Venkatachala  but do not whether it will be suitable  for me or not. Anybody already having his book please reply... I really need to improve my problem solving skills in this.
Feel free to add tags.

REPLY [5 votes]: There is the functional equations training book by Andreescu and Andrica, and the functional equations book by Chris Small. Both are good, and contest-oriented. Have not seen the book mentioned in the OP.