The main branch of the Grand Rapids Public Library (downtown) has a whole floor dedicated to Grand Rapids and state history. You might check there for possible resources.
Also, just about any state run tourists information/visitor centers have books about Michigan. Try state parks with gift shops. Hoffmaster State Park and Ludington State Park both have nature center/visitor centers so you might try those. You will have to pay a fee to get into the park though.
There is also a Michigan estore that has some books and videos on Michigan history.
mom24boys, LBC guide to MI history looks great! However, I can’t seem to find a sample, literature list, or age range on their website. Have you any idea where I can locate this info? Thanks ~ Heather