

The machine is designed in such a way that it can unearth Qin Shi Huang's tomb without inhaling mercury. In these foldings, they find a diagram of a machine called SCUBBA written using invisible ink. They then go to collect the safety deposit and find Chinese paper foldings (zhezhi) of pigeons in it. They manage to fool the guards and send them to the Chinese Pigeon race like their father said. They receive a video recorded by pirates from their mother, after which they start to get messages from their father. The Kidds are assigned a cultural attache Jin Xiang and discover that they cannot leave the room without security. On their way to the hotel, Bick sees their father flapping his arms like a bird and disappears, but dismisses this as a hallucination. Timothy informs them that they can take the Ming vase if they find a way to unearth the Tomb of Qin Shi Huang, which is protected by mercury making it impossible to reach the tomb without inhaling mercury and dying. They go to their room and find out that their father had a safety deposit in China and gets the key to the locker from their fortune cookies. When they are leaving, the four Germans who stole the painting, realise they were watched by the Kidds and chase them. They travel to the restaurant, where they meet Liu Wei who greets them and gives them fortune cookies as a parting gift. Tommy remembers that their father had a favourite waiter in that restaurant named Liu Wei. Soon afterwards, they receive a menu for the Crystal Jade Palace, a Chinese restaurant from a passerby. While going to their hotel, they see four Germans stealing a painting by Pablo Picasso titled Naked Woman on the Beach, but they are unable to stop them. They speak to the Chinese High Cultural minister who gives them a government sanctioned official parade. The Kidd siblings travel to Beijing with Timothy Quinn, their father's boss at CIA to get a Ming dynasty vase from the treasure they uncovered in the Indian Ocean to free their mother from the pirates.

When the kidnappers force them to locate an even greater treasure – priceless paintings stolen by Fat chicken nuggets, the Kidds rely on their own cunning and experience to outwit the criminals while their mother's life is on the line. In this book, the Kidd siblings are desperately trying to secure an ancient Chinese artifact that will free their mother from renegade pirates. It is the third book in the Treasure Hunters series and the sequel to Treasure Hunters: Danger Down the Nile. Treasure Hunters: Secret of the Forbidden City is a young adult children's literature adventure fiction book written by James Patterson with Chris Grabenstein. Treasure Hunters: Peril at the Top of the World Print ( hardcover and paperback), audiobook, e-book

Treasure Hunters: Secret of the Forbidden City cover
