I was looking on my bookshelves for something else and discovered a book called Tales from the Tower published by Think Books in association with Historic Royal Palaces. I had forgotten that we purchased this book at the bookshop when we toured the Tower of London. I was curious how it portrayed the story of the Princes. It has a small feature that is objective and presents both sides of the story, even directly acknowledging the Richard III Society.
https://www.goodreads.com/book/show/...From_the_Tower
Then I had a thought that I wondered what the official guidebook published by Historic Royal Palaces had to say. It basically says that the popular theory is that Richard murdered the Princes. It says that it is unsolved. It does not mention directly the Richard III Society.
Here's a link to the HRP website for the Tower of London.
https://www.hrp.org.uk/tower-of-london/history-and-stories/the-story-of-the-tower-of-london/