Tangshan Tigers: The Golden Key by Dan Lee (author)

The Tigers are back at the Beijing International Academy, training for their next victory. But when Master Chang and their friend Li-lian both disappear in strange circumstances, the Tigers grow suspicious. A vital clue leads them to their Master – but it’s just the start of a deadly hunt. Now the Tigers and Master Chang must find a mysterious golden key which will unlock priceless treasures… and save Li-lian’s life.