A series of 12 French youth novels, each 92 pages long, for children aged 8 to 12. This collection covers the first half of season 2 of The Mysterious Cities of Gold series, from Barcelona to the Forbidden City. By Pascale Lecœur, published by Pocket Jeunesse (PKJ) between 2013 and 2015.

1. L'évasion (The escape)
2. Le secret du médaillon (The secret of the medallion)
3. Le mystère de la grotte (The mystery of the cave)
4. Prisonniers des pirates (Prisoners of the pirates)
5. Les secrets de l'alchimiste (The secrets of the alchemist)
6. Le navire volant d'Ambrosius (The flying ship of Ambrosius)
7. L'arrivée au temple (Arrival at the temple)
8. Complot au monastère (Conspiracy at the monastery)
9. La terrible prophétie (The terrible prophecy)
10. La mystérieuse perle noire (The mysterious black pearl)
11. Sur la piste du dragon jaune (On the trail of the yellow dragon)
12. Panique dans la cité interdite (Panic in the Forbidden City)