You might be interested in reading THE PRINCES IN THE TOWER, by Alison Weir and THE MYSTERY of the PRINCES, by Audrey Williamson. There are other good books, but you should start with these two.
I read Alison Weir's book somewhere along the line, it's very solid. Had Millais's very romanticised portrait of the two princes on the cover.
Haven't read Williamson, but I'm sure I can find a copy. I still have my stack card to Emory U. library, even though I took my degree in 1980, and they never throw ANYthing away.