The Cracksman Door is the eighth book in my Private Investigator Andrew Knight Mystery series. This is the second book that has a steampunk inspired storyline. The Cracksmen faithfully served the citizens of Lunara since the underground city was built in the 1900's, but a few years later things changed for the worse. The city leaders decided that the Cracksmen had outlived their usefulness and were no longer welcome in the 'perfect society'. The Cracksmen had their families were banished forever from the underground city of Lunara. Now more than one hundred years later, the descendents of those original Cracksmen are given a chance to come home to Lunara, a city they have never known. Once more Private Investigator Andrew Knight is drawn into a world he desperately tried to forget. He must discover the truth as to why after all these years the Cracksmen are being welcomed back with open arms. This time it will be far more dangerous and Andrew may be asked to pay the ultimate price.