The hotel that the book signing is taking place in is the Holiday Inn Express but if you are looking for something different, Deadwood has a variety of places to stay also.
There are historical hotels, resorts, bed and breakfasts, and more.
If you click the following link the chamber of commerce has lots of options to choose from – https://www.deadwood.com/lodging/
Sturgis, Lead, and Spearfish are nearby towns with other options as well.