Search for the Dragon Ship (Secrets Of Droon #18) by Tony Abbott

Happy Hunting! 

The evil princess Salamandra is on a hunt for the magical Dragon Ship. So Eric, Neal, and Julie must find it first! There's just one problem...the ship is in pieces scattered all over Droon. 

It's a race to put the ship back together, and the winner takes all. All of Droon, that is. 

A Hidden Door. A Magical Staircase. Discover the World of Droon!