Elizabeth's London - 16th century
Restoration London - 17th century
Dr. Johnson's London - mid-18th century
Victorian London - late 18th century
They're about the lifestyles of regular people as opposed to royalty (some of that information must have been hard to track down for the earlier books), and they cover topics like birth and death, medicine, food and drink, entertainment, architecture, transportation and the layout of the city, education, politics, social structures, and a lot of other stuff I can't remember at the moment.
They're interesting if you want to know about London specifically, but they're also really good for getting a picture of what life would be like in an era with less advanced technology than our own.