<Tr> <Th> 6 </Th> <Td> 1988 </Td> <Td> The Cat Who Played Post Office </Td> <Td> 0 - 515 - 09320 - 3 </Td> <Td> A bicycling mishap and a brightly painted room have Qwill's mustache twitching . </Td> </Tr> <Tr> <Th> 7 </Th> <Td> 1988 </Td> <Td> The Cat Who Knew Shakespeare </Td> <Td> 0 - 515 - 09582 - 6 </Td> <Td> Fire and death at the newspaper offices . </Td> </Tr> <Tr> <Th> 8 </Th> <Td> 1988 </Td> <Td> The Cat Who Sniffed Glue </Td> <Td> 0 - 515 - 09954 - 6 </Td> <Td> Vandalism appears in Pickax and a couple is murdered . </Td> </Tr> <Tr> <Th> 9 </Th> <Td> </Td> <Td> The Cat Who Went Underground </Td> <Td> 0 - 515 - 10123 - 0 </Td> <Td> Qwill goes on vacation and carpenters in the area start dying . </Td> </Tr>

Where do the cat who books take place