a familiar villain（精裝）

While stepping in to help a friend, The Code Breakers get busy battling mysterious attackers and tracing stolen jewellery! Who has kidnapped Benji''s father and what do all the threatening notes mean? Will The Code Breakers be able to find the mastermind and rescue their friend?Join the Math Mystery Code Breakers as they tackle exciting puzzles that lead to deeper investigation, and intrigue! Matthew, Berlinda and Jimmy have always loved Maths. Little did they know that their hobby of solving Maths puzzles would eventually lead them to work with the police to crack some of the toughest criminal cases, take them to different countries, and meet with all sorts of dangers that would test them to their limits!Each book in the series is a new adventure that invites readers to help solve Maths puzzles and codes, together with the three friends. Solutions are provided, and the stories also come with interesting and educational fun facts to grab the interest of readers.