[Lordstan]

First off...Great book and very nice signature. It really displays well.

Whatever you do do NOT try and take that sticker off unless you can be happy with a chunk of ink missing. I have almost a complete run of Sport Mag from 1946-1986 and can personally vouch for how frail the paper is, especially the 1940s and 50s books.
I sent one off to an autograph singing and the promoter put post-it notes on the back and on a page to mark where the player would sign. Both post it notes, not only removed ink, but also tore the paper slightly.
If post it notes, which are supposed to be removable, damage the paper and ink, I can only imagine worse from a sticker that is not meant to be removed.

FYI I never tried to remove a PSA or JSA sticker, so I guess I could be wrong, but I would be very cautious about something that nice/valuable.

Just my 2c.
Good Luck,
Mark

Added: FWIW, much to my chagrin, with the sticker, it will probably be more saleable and for a higher price in the near future, should you ever need to sell it. With all the recent scandals, who knows what'll happen in the future, but for now seemingly the majority of buyers love to see those 3 little initials.