Monsters -- Juvenile fiction. Survival -- Juvenile fiction. Voyages and travels -- Juvenile fiction. Supervillains -- Juvenile fiction. Monsters -- Fiction.

Time travel -- Juvenile fiction. Friendship -- Juvenile fiction. Interpersonal relations -- Juvenile fiction. Fate and fatalism -- Juvenile fiction. Life change events -- Juvenile fiction.

Voyages and travels -- Fiction. Magic -- Fiction. Grandfathers -- Fiction. Postcards -- Fiction.

Travel. Young adults -- Travel.

Singapore -- Guidebooks. Singapore -- Description and travel.

Murder -- Fiction. Ocean travel -- Fiction. Islands -- Fiction. Missing persons -- Fiction. Secrecy -- Fiction.

Cartographers -- Juvenile fiction. Imaginary places -- Juvenile fiction. Quests (Expeditions) -- Juvenile fiction. Ocean travel -- Juvenile fiction.

Porto (Portugal) -- Guidebooks. Porto (Portugal) -- Description and travel.

Interstellar travel -- Juvenile fiction. Museums -- Fiction. Friendship -- Fiction. Science fiction.