<Tr> <Th> 10 </Th> <Td> The Shooting Star </Td> <Td> 1941--1942 </Td> <Td> </Td> <Td> 1942 </Td> </Tr> <Tr> <Th> 11 </Th> <Td> The Secret of the Unicorn </Td> <Td> 1942--1943 </Td> <Td> </Td> <Td> 1943 </Td> <Td> Books 11 to 15 set a middle period for Hergé marked by war and changing collaborators . </Td> </Tr> <Tr> <Th> 12 </Th> <Td> Red Rackham's Treasure </Td> <Td> 1943 </Td> <Td> </Td> <Td> 1944 </Td> </Tr> <Tr> <Th> 13 </Th> <Td> The Seven Crystal Balls </Td> <Td> 1943--1946 </Td> <Td> </Td> <Td> 1948 </Td> </Tr>

Where did the two go for their first adventure