What kind of information is available about Morgan silver dollars?

Basic: The best advice is to obtain a book from a bookseller or local coin shop called "A GUIDE TO UNITED STATES COINS" by RS Yeoman - The "Red Book" as it is called. This book is the mainstay for coin values for dealers and collectors. The ISBNs are = ISBN-10: 079482267-3 ; and ISBN-13: 978-079482267-5. Bear in mind that the quotes in that book are top-end retail; most collectors or dealers will most likely offer slightly less. VAMs = You need to look for special books on this topic. VAMs are minting varieties of the Morgan Dollars, and command a significant following with some collectors.