We found 2 Reddit comments about Haunted Wisconsin. Here are the top ones, ranked by their Reddit score.
Haunted Wisconsin https://www.amazon.com/dp/0299285944/ref=cm_sw_r_cp_api_lbo6ybS4XM6BH
There was a book published in 1980 called Haunted Wisconsin that was a fun read pre internet days. It focused on Wisconsin and broke it down (if memory serves me correctly) by either county or region. Have a look if you can pick it up cheap.
Haunted Wisconsin https://www.amazon.com/dp/0299285944/ref=cm_sw_r_cp_api_lbo6ybS4XM6BH
There was a book published in 1980 called Haunted Wisconsin that was a fun read pre internet days. It focused on Wisconsin and broke it down (if memory serves me correctly) by either county or region. Have a look if you can pick it up cheap.