<Tr> <Td> 29 </Td> <Td> A Big Day For Baseball </Td> <Td> August 1, 2017 </Td> <Td> </Td> <Td> Jack & Annie are whisked back to Brooklyn's Ebbets Field on April 15, 1947, to witness Jackie Robinson's Major League debut . Companion book: #37, Baseball . </Td> </Tr> <Tr> <Td> 30 </Td> <Td> Hurricane Heroes in Texas </Td> <Td> August 7, 2018 </Td> <Td> </Td> <Td> Jack and Annie are on a mission! When the magic tree house whisks them back to Galveston, Texas, in 1900, they find out that a big storm is coming . But even though there is rain and wind, no one believes there is any danger . As the storm grows, seawater floods the city . Now everyone needs help! Jack and Annie have a little bit of magic and a lot of hope--but will it be enough? Companion book: #39, Texas . </Td> </Tr> <Tr> <Td> 31 </Td> <Td> Warriors in Winter </Td> <Td> January 8, 2019 </Td> <Td> </Td> <Td> We are warriors! Jack and Annie have met knights, pirates, ninjas, and Vikings, but they have never met the most fearsome warriors of all: Roman soldiers . When the magic tree house whisks them back to the early 100s AD, Jack and Annie find themselves in a Roman camp . Their mission: Be like a warrior . That is easier said than done! The Roman soldiers are much scarier in person--and suspicious of strangers . Then a mysterious man riding a black horse gives Jack and Annie some advice to help them on their mission . But the man may not be who he seems . Will Jack and Annie be good warriors? Can they learn what makes the Roman soldiers so great? And who is the mysterious rider ...? Companion book: #40, Warriors . </Td> </Tr> <P> Magic Tree House Merlin Mission Books 1 - 27 were written for more advanced readers . They are more challenging adventures for readers ages 7--10 . </P>

What is the highest magic tree house book