Wizard For Hire (Felix Freeman, #1)

And I am Will Norton, an ordinary man, down on my luck. And I've just moved into a house share in London, little did I know that in the attic of this house lived a real life wizard.
This wizard, Felix Freeman, lives in a world that doesn't believe him.
Now accused of a "murder by magic" in the vaults of an underground bank in central London, he must fight to prove his innocence.
And then there's me, caught between the police and the wizard, and the only god-damn witness to the wizards innocence.
This is the only truthful account of everything that happened... Oh, did I mention the magic ring that lets you teleport? And the black magic wizard that is after it and trying to kill us?
"Dresden Files meets Sherlock Holmes"