There are books out there on the internet.
But, I prefer to do my reading in the library (where the wireless connection is kind of weak).
So what would I recommend? A gent by the name of Kuhnhausen has 2 books out on the 1911.
When I am in the library and need something to refresh or learn about the 1911, you can bet that one of these goes with me.
(and if you forget them on the bathroom scale, they don't weigh that much to wear down the battery).