With regards to Monaghan a good read is the following:
“Social and Spatial Order in the MacMahon Lordship of Airghialla in the Late Sixteenth Century” — Patrick J. Duffy
Can be found in: “Gaelic Ireland, C.1250-c.1650: Land, Lordship and Settlement”
Detailed book with regard to Territorial and Economic Divisons is:
“Medieval Ireland
Territorial, political and economic divisions”
By Paul McCotter
http://www.fourcourtspress.ie/books/2014/medieval-ireland/
http://www.amazon.co.uk/Medieval-Ireland-Territorial-Political-Divisions/dp/1846825571/ref=sr_1_1?ie=UTF8&qid=1435412487&sr=8-1&keywords=medieval+ireland+territorial