<Table> Fifty Shades <Tr> <Td_colspan="2"> Trilogy pack set </Td> </Tr> <Tr> <Td_colspan="2"> Fifty Shades of Grey Fifty Shades Darker Fifty Shades Freed Grey Darker </Td> </Tr> <Tr> <Th> Author </Th> <Td> E.L. James </Td> </Tr> <Tr> <Th> Country </Th> <Td> United Kingdom </Td> </Tr> <Tr> <Th> Language </Th> <Td> English </Td> </Tr> <Tr> <Th> Genre </Th> <Td> Erotic romance </Td> </Tr> <Tr> <Th> Publisher </Th> <Td> Vintage Books </Td> </Tr> <Tr> <Th> Published </Th> <Td> 2011--2017 </Td> </Tr> <Tr> <Th> Media type </Th> <Td> Print (Paperback) </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Trilogy pack set </Td> </Tr>

What are the names of the fifty shades of grey series