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Sienna Mercer

27 children’s books by the writer

Sienna Mercer lives in Toronto, Canada, with her two cats, Calypso and Angel. She does most of her writing in her attic, surrounded by photos of her travels. She doesn't have a twin sister, but has always wished that she did. She is also the author of the howlingly funny My Brother the Werewolf series.

8-11 years

Puppy Love!

Sienna Mercer

Puppy Love!

From the best-selling author of My Sister the Vampire comes a brand new paranormal romance for young girls. To their classmates, Daniel and Justin are identical twin brothers. But in fact they couldn't be more different. The Packer twins ...

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8-10 years

Howl-oween!

Sienna Mercer

Howl-oween!

The third title in the brilliantly funny new series from the author of My Sister the Vampire. It's Halloween, but twins Daniel and Justin aren't about to be spooked by ghosts and pumpkins - after all, one of them ...

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8-11 years

Tail Spin

Sienna Mercer

Tail Spin

The fourth title in the brilliantly funny new series from the author of My Sister the Vampire Justin and Daniel are in a spin. Justin's begun taking dance classes with his girlfriend, Riley. But if the football team find ...

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8-9 years

Cry Wolf!

Sienna Mercer

Cry Wolf!

From the best-selling author of My Sister the Vampire comes a brand new paranormal romance for young girls. To their classmates, Daniel and Justin are identical twin brothers. But in fact they couldn't be more different. On their thirteenth ...

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9-11 years

Secrets and Spies

Sienna Mercer

Secrets and Spies

This is a funny, super-girly story with a vampire bite to it. Sink your teeth into Olivia and Ivy's fifteenth fright-time adventure. There's always a lot of stuff to keep hidden in Franklin Grove (like, um, the fact ...

£5.99

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8-11 years

Flying Solo

Sienna Mercer

Flying Solo

Sink your teeth into Sienna Mercer's eleventh super-girly vampire story for girls. Olivia is a vegetarian. Ivy is a vampire. And they're twins?!? 'We're still double trouble!' The twins are apart, but life is as batty as ...

£5.99

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8-11 years

Stake Out!

Sienna Mercer

Stake Out!

Sink your teeth into Sienna Mercer's twelfth super-girly vampire story for girls. 'We're on a mission!' Ivy and Olivia are together again - and not a moment too soon. The whole vampire community is in a flap. Can the ...

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8+ years

Date with Destiny

Sienna Mercer

Date with Destiny

Sink your teeth into Sienna Mercer's tenth super-girly vampire story for girls. The twins are back in Transylvania for Prince Alex and Tessa's wedding, and to settle Ivy in to the Wallachia Academy. Plus they've landed the ...

£5.99

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