Dime Store Novel: Timeline

The Dime Store Novel series has three story arcs:

Hell's Kitchen story arc - the background story that occurs in Hell's Kitchen before Mary O'Malley and Regan Worth are born.
New Orleans story arc - the background story that occurs in New Orleans before Hanover Fist and Toledo Cats are born
Main story arc- the adventures of Hanover Fist, Toledo Cats, Mary O'Malley and Regan Worth

The authors recommend reading the books in (somewhat) chronological order, as shown from left to right below. The caption identifies the year in which the story takes place and the story arc it belongs to.