The books are set in 1920s so tell us about your research process into this time.
Oh my goodness. The first couple of books were so all-encompassing in making sure that every single detail was correct. I don’t know if I got everything right, but the feedback so far has been positive in that regards. Speech patterns, expressions, cost of items, locations, food, drink, clothing, transportation – I felt I had to stop every other sentence to verify a fact. And that was despite all of the pre-research I did before I ever even wrote the first word! Finally, I became so engrossed in the era, I was able to keep the writing flowing and only verify now and then.