Mathematical Olympiads 1998–-1999: Problems and Solutions from Around the World (MAA Problem Book Series)
...invaluable to anyone involved in training national mathematics teams or simply interested in challenging problems from elementary mathematics. --Zentralblatt für MathematikHats off to Andreescu and Feng for putting together this interesting collection of the best from around the world.  --Alan Law, Crux MathematicorumThis is a wonderful book for puzzle lovers...it belongs in the hands of everyone interested in National Mathematics Contests. --Carl Mueller, MAA Online