内容简介
JackandAnniecontinuetheirquestforthesecretsofhappiness-secretstheyneedifthey'regoingtosaveMerlin.Butwhenthemagictreehouseleadsthemtoatinydesertedislandinthemiddleoftheocean,they'renotsurewhoneedshelpmore-MerlinorthemselvesThebrotherandsisterteamaresoonrescuedbyashipofexplorersandscientists.Butthecrewisn'tlookingforthesecretsofhappiness.Thecrewislookingfor...aseamonster.