The brand new Aeronautica Imperialis rulebook, specifically for the Horus Heresy, has arrived and I immediately dove into it. Been waiting for this book as it is just perfect for the opening stages of my 30k Burning of Prospero campaign.
Did a complete review here with a few piccies:
https://ttgamingdiary.wordpress.com/2022/09/01/review-aeronautica-for-the-horus-heresy/
TL;DR, it is a decent, quality hardback that does not seem to be skimped on in any way and includes all the most recent Imperial models from Forge World such as the Custodes Ares Gunship. If the Heresy is your thing, I recommend.