To find books on state government try using a subject search in Mirlyn.
[State] politics and government
You can also search Mirlyn using the State as the Author. If you find that you're getting hits from non-governmental state associations then try searching with a state agency or legsilature as the author
e.g. Michigan Legislature
Directory of Websites for State of Michigan - A breakdown of content areas, agencies and branches of government.
You can restrict a Google search to a specific domain by adding site:domain. Most states follow the [state name].gov domain convention but it's good to double check. To search for foreclosure prevention information from the State of Michigan website you could try Googling: "foreclosure prevention" site:michigan.gov