Here is preface that I include in the upcoming novel:
The Strangers' Universe. One universe, parallel to our own. One timeline, from the beginning to the end. Many stories under one overarching story, across universe and time. These are the stories told so far: Truths, Half-Truths and Lies; End of an Era; Dawn to Dawn and Just Another Scout.
The events of End of an Era happen 200,000 years before the Revelation. Dawn to Dawn happens on May 27th, 2927, the day of the Revelation. Just Another Scout is five years after the Revelation. Truths, Half-Truths and Lies happens between years 1947 and 2932 (5 years After the Revelation), so that Chapter 5.8 happens at the same time as Dawn to Dawn, Chapter 6.0 is a direct continuation of Dawn to Dawn and Chapter 6.2 is immediately after the epilogue of Just Another Scout.
I am currently editing the novel and preface may change before publishing but the contents remain pretty much the same. Idea of the preface is to give you some context for the stories that happen in the Strangers' Universe.