How can I find an online list of people buried in Delaware County (Indiana)?

Some information can be found at our website's Pioneer Cemetery Preservation Committee pages.  Another good source is:  http://www.rootsweb.com/~indelawa/Cemeteries/repl-cem-list.html

Are any of the Delaware County History Books available online? 

Yes.  Try this link:  http://www.rootsweb.com/~indelawa/History/county-history-other.html