Plattsmouth is the county seat of Cass County, Nebraska where a lot of my research is focused. The city of Plattsmouth web site is located at http://www.plattsmouth.org/
Once on the page, click on Departments, then select Library for the new web location of the Plattsmouth Library. The library can also be found on Facebook.
Under the Living in Plattsmouth menu item, you'll find a link to the Cass County Museum - an essential research location for anyone doing research in the county.
Also of help is the Cass County web site. Here's a quick look at the history and towns of Cass county.
Another interesting web site is the Plattsmouth Covservancy. Who's up for the Haunted Victorian Ghost Walk? That will take place October 22 and 23. I might be interested if it wasn't after dark! BOO!