Does anyone know a good book set in the 15th century?

I noticed how much you can actual learn from a historical novel, and
its potential for education. I speak to you as a A Level history
student and i was wondering if there are any good books about set in
the 15th century, revolving around the War of the Roses of
specifically Richard III. Idealy i would like it plot based as i find
i cannot settle down for a good read of a history reference book and
come away with the same smile you have from reading and learning from
a historical fiction book. So if anyone has any ideas, please let me
know!

Thank you kindly,

Jonny