Mushroom Model Publication has released the second volume of the Finnish Fighter Color series. You can find a review of Volume 1 here on the reviews site.
This book, as Volume 1, is structured by aircraft type. Each aircraft type has two chapters. The first one is devoted to the historical introduction on each type including how it was procured and how it did perform in Finnish service. In many cases there are plenty of historical details on different missions including date, location, number of airplanes involved and mission kills/losses. There are no first-hand narratives of pilots involved in the action, so I suppose the information is coming from squadron records.