This is the deal I am writing a series of Books called Grotheske, for those that didn't know about i will also add the link bellow. Well the novel is written in Cases, being each case a single book. Some will happen in the past, others more in the present and so on. I developed a plot of a Bonus episode that is related to Christmas. It was my intent to publish it during the hollidays but I had some personal health issues in the family and it got postponed. However i feel that I owe the bonus episode to my readers so I made it. My readers are everything to me. My question is this. Where to put it. I already have 10 episodes of the first book. Is it better to create another book, even being of the same series, to put those special episodes, or, do i publish them in the middle of the other book, even being a total different story with the same characters? I thank you all in advance.
The series is this one