Chicago is rich with genealogy records but if one does not live in or near this vast city it is very hard to obtain those records.
This book, however, has helped me immensely with the research of my husband's Irish Chicago ancestors - what to look for, where to look, where to write. Besides giving a brief history of Chicago and its records, it includes information about the great fire and the destruction of the vast number of public records. But then it gives hints on what to look for when these records are needed by the genealogist and what can be used instead.
The book is chock full of information of libraries, depositories, collections, addresses - everything the genealogist needs to research the City of Chicago.
Be sure to get the most updated version because addresses and prices do change.