A very warm welcome Hazelman! This Forum is particularly great for its expertise, honesty, and frequency of posts and replies, in my opinion! For shilling varieties I would recommend 'English Silver Coinage since 1649' by Seaby / Rayner, and 'The Identification of British 20th Century Silver Coin Varieties' by David J Groom (a member on here) And I wish you all the luck in the world, do you have a 1905 shilling you are happy with yet?