For the most part, I have been writing towards what I want to do. An overview of the history of the battles that took place. Followed by any rule addendum that need to be added for the scenarios. And lastly anywhere from 18 to 25 scenarios on that topic. In some cases, such as my Greek Campaign and the East Africa one, I have included information for a Bag the Hun campaign for the air war fought over those particular battle grounds.
But what is it that you are looking for in a scenario book? What would you be interested in seeing? Does it need pictures of miniatures and terrain? Do you want period historical maps?
Granted, I tend to look for more obscure campaigns than other scenario authors. But what would get you to buy scenarios about the Italians on the Eastern Front in 1941?
As it stands, I have about 23 pages of background on the campaign covering August to December 1941. There will probably be about 25 scenarios total for both the IABSM and Troop, Weapons & Tactics rules.