Landlord tenant laws can cover quite a bit of area. What specifically are you seeking? Are you curious about this from the standpoint of a landlord/prospective landlord or a tenant?
If you want a good general overview checklist a good site can be found at http://www.tenant.net/Other_Areas/Ohio/landlord.html
Another good resource (from the landlord side of the table) is the fair housing act series at www.findthatqualitytenant.com. The link to this is http://www.findthatqualitytenant.com/fairhousing.html