Uncle Andrew's Study was the place in which Andrew Ketterley worked on and developed the magic rings that transported Digory and Polly into The Wood Between the Worlds.

The study is located in the attic of the Ketterley's house, and is rather cozily hidden.

In this room, Digory and Polly saw that "every bit of the walls was lined with shelves, and every bit of the shelves was full of books." In front of the fireplace, there was a high backed chair, and on the table, in the middle of the room, there were things such as reading books, books of the sort you write in, papers and a microscope, as well as a tray holding the magic rings.

Digory and Polly were able to access the study, by using the tunnel leading from Polly's Smugglers' Cave.