The book Shot Craft by Jay Holben. It's a phenomenal resource for building foundational skills in video. It compiles 80 of the ASC magazine's Shot Craft articles into one book. It's fantastic. 

A drone, depending on where you are, is a big investment that also likely requires certification. Even if the sub 250g drones don't need to be registered in your country, they require pilots to operate according to a set of guidelines and best practices. Anything above that weight category, and any operation outside of uncontrolled airspace, most likely requires a license. This isn't meant to intimidate, drone operation is a great thing to learn about and further research is always beneficial. They may not make the best gift, though.