<Tr> <Td> 10 </Td> <Td> Ghost Town at Sundown (UK title: A Wild West Ride) </Td> <Td> 000000001997 - 09 - 16 - 0000 September 16, 1997 </Td> <Td> In the mystery of the Ancient riddles #2 </Td> <Td> Set in the American Wild West, where Jack and Annie meet a cowboy named Slim . </Td> </Tr> <Tr> <Td> 11 </Td> <Td> Lions at Lunchtime (UK title: Lions on the Loose) </Td> <Td> 000000001998 - 02 - 12 - 0000 February 12, 1998 </Td> <Td> In the mystery of the Ancient riddles #3 </Td> <Td> Jack and Annie are on a mission on the African Savannah . </Td> </Tr> <Tr> <Td> 12 </Td> <Td> Polar Bears Past Bedtime (UK title: Icy Escape) </Td> <Td> 000000001998 - 04 - 24 - 0000 April 24, 1998 </Td> <Td> In the mystery of the Ancient riddles #4 </Td> <Td> Set in the North Pole, Jack and Annie meet an Inuit . Companion book: #16, Polar Bears and the Arctic . </Td> </Tr> <Tr> <Td> 13 </Td> <Td> Vacation Under The Volcano (UK title: Racing with Gladiators) </Td> <Td> 000000001998 - 06 - 20 - 0000 June 20, 1998 </Td> <Td> In the mystery of the Lost stories #1 </Td> <Td> Jack and Annie travel to Pompeii on the eve of the eruption of Mt . Vesuvius . Companion book: #14: Ancient Rome and Pompeii . </Td> </Tr>

When does the next magic tree house book come out