I recall being somewhat impressed by a novel I read a few years back – this book may be less than five years old – which featured a college-aged man. He had a laptop which transformed into a
troll goblin that served as his familiar.
In the story's universe, mages had switched to the Internet for most of their magic & communication. The main character was essentially a magical hacker, and spent much of the book fighting against his evil aunt (I think, I know it was a female relative) with the help of his cousin.
Older forms of magic were also featured, including using special paintings as magical portals, and spells being whistled by wizards. It features a scene at a gas station where the laptop is disabled by a virus, and the main character whistles a spell to reanimate dinosaurs from the gasoline.
Is this ringing any bells?