Book Randolph County, 1779-1979 is on the Internet Archive located here. For this one, I recommend going to the index in the back of the book to find your surnames indexed. This navigates just like a book.
LAND RECORDS ONLINE
Older Land Records – Before searching this site, make sure to click on the Old Index Books tab in the upper right corner. It takes a little practice to figure out how the index works, but once you figure it out, you can drill into the actual images, if they’re available for the year you are researching.
Soil Survey Map from 1915 overlay on modern day map.
NC HISTORIES ONLINE See the Digital NC Blog
MILITARY RECORDS for men from Randolph County… Be sure to check out the FamilySearch Wiki for Randolph County… scroll down and find Confederate units from Randolph County.
EXCELLENT LIST OF RESOURCE FOR ALL TYPES OF RANDOLPH COUNTY RECORDS AT FamilySearch Wiki.