Like a Charm by Elle McNicoll

Edinburgh is a city filled with magical creatures. No one can see them... until Ramya Knox.

As she is pulled into her family's world of secrets and spells, Ramya sets out to discover the truth behind the Hidden Folk with only three words of warning from her grandfather: Beware the Sirens. Plunged into an adventure that will change everything, Ramya is about to learn that there is more to her powers than she ever imagined.

( I loved this one! Lx )