Smoke & Mirrors by Barry Jonsberg

I don't know about love. I suspect the emotion that others apparently feel all the time is just . . . absent from me. Like there's an ingredient missing from the recipe. The possible exception is Gran.

Grace cares about only two things: performing magic and her cantankerous gran. Gran shares her prickly personality and spiky sense of humour, and she's the only one Grace lets into her tightly locked heart - until she meets Simon, a schoolmate who promises to help her turn her magic tricks into a small business and social media stardom.

When Gran is diagnosed with a terminal illness, Grace moves in to become her primary carer. With the help of Simon and some sleight of hand, Grace is determined to bring joy back into their lives. And when she confronts her worst fear, she realises maybe her heart doesn't need to stay locked away after all.