One field of interest that my son keeps returning to is that of inventions and inventors. This is such a wonderful topic that can bridge all kinds of subjects. However, I'm not posting a well researched list of resources, rather I thought I'd share a specific branch of this topic that my son is keenly interested in!
The World's Worst Inventions: The Most Stupid Gadgets and Machines Ever Made by Jack Watkins.
These types of books are well read in this house!