. . "Author"@en . . . "Sienna Mercer"@en . . . "Toronto, Ontario, Canada"@en . . . . . . "Mercer, Sienna"@en . . "Sienna Mercer (born in 1956) is a Canadian author and has written the My Sister the Vampire series of books."@en . "Sienna Mercer (born in 1956) is a Canadian author and has written the My Sister the Vampire series of books."@en . "Toronto, Ontario, Canada"@en . . . . "1956"^^ . "Sienna Mercer"@en . . . "1956"^^ . .