Finding books about Ranelagh or its history is difficult – considerable searching has only found me a couple of references, although one of them is very good indeed.
Ranelagh is mentioned in Chapter 16 of The Neighbourhood of Dublin, written by Weston St. John Joyce around the end of the 19th Century.
A rather more up-to-date account is Deidre Kelly’s Four Roads to Dublin: The History of Ranelagh, Rathmines and Leeson Street, published in 1997. It deals with the origins of Ranelagh, Rathmines, Donnybrook and Ballsbridge, from the days when they were an unclaimed area outside the walls of Dublin to the present day.
Ranelagh is also mentioned occasionally in Families of Co. Dublin, Ireland, although that’s probably more of interest to genealogists than people living in or visiting the area. It was produced by the Irish Genealogical Foundation in 1999.