Do you mean is sells books as well, or that it's called "Oxfam Music and Books" or both?

In this mapillary image from August 2023 it seems that the store is branded as "Oxfam Music": https://www.mapillary.com/app/?z=17.66803903824338&lat=50.901953070091395&lng=-1.4041352117228598&pKey=1297102577591494&focus=photo also the store website https://www.oxfam.org.uk/shops/oxfam-music-shop-southampton/ says it's an "Oxfam Music" store.

If those two datapoints are still valid, perhaps it should be mapped as "Oxfam Music" but with shop=music;books and a note to explain?