Edward Marston has several series, including the Railway Detective ones (Victorian) and the Home Front ones (set in the First World War). I have read quite a few of both, and also some of his other books set in the 11th century, the early 19th century and the twenties (thirties?). As you might expect, they have similarities, but I have enjoyed the Railway Detective ones for their setting of the railways and for the story of the characters as it progresses through the series. The Home Front ones are about London policemen during WWI, and again, the characters' stories progress while the crimes are being investigated.
They are not great literature, I'm sure, but they are a pleasant read. Edward Marston is married to Judith Cutler, whose books I also enjoy.
Hope that helps!