Jane Cumberlidge's book is an extensive (and expensive) piece of work concerning the inland waterways of the island of Ireland. It covers the full gambit of waterway interests, including the voluntary societies that operate in this sphere as well as conservation and development issues. The meat of the book is a description of all of the navigable and formerly navigable waterways in the island.
Primarily aimed at the boater, the book nonetheless contains sufficient industrial heritage interest in the form of maps of each waterway showing the location of locks and key bridges, distance tables, a history of each route covered and suggestions for things to do and see.
One canal not mentioned (and one for which little information appears to exist) is Lacy's Canal south of Mullingar. Marked on OS Discovery series maps 41 & 48, it runs from the north end of Lough Ennel, ending in the River Brosna just south of Mullingar. Any information on this would be welcomed.