After Jack and Annie had become master librarians, they saved four ancient books that




almost




could be vanished into history as their mission.

Even though Jack and Annie cleared all of the missions, they were a bit worried because that could be their last adventures, but thankfully Morgan said




that




they could get another trip in a few weeks.

This #17 book was




about




the first trip after ancient book mission




s had done




and Jack and Annie




as before




, had a signal of strong rain smashing against their window which sen




t




them to themagic tree house.

They expected to meet Morgan but all they could see




was




a small dog named Teddy by Annie and a note from Morgan.

The note explained that Teddy is under a spell and needs their help.

To help free Teddy, Jack and Annie must be given




four




special things from their




next




four trips.

However,they could not get any help by master librarian card this time




so




have to solve by themselves on those missions.

Teddy gave a notice to Jack and Annie by stepping on one book for the next trip and Jack and Annie




got




into the book




named


‘




The Unsinkable Ship




’


.