I agree with both foiling and PlanesPictures that Avico Press books are among the very best and most desirable aviation books I've ever seen.
It has been my dream for many years to own all the Avico Press books but to say it's hard to get copies of them is an understatement if ever there was one... Actually, I'm very curious to know how you managed to receive them safely and how much it cost you, foiling (if you would kindly say so in a private message of course) because the Myasishchev encyclopedia in particular is #1 on my wish list, but considering the number of volumes, I can't even think of placing an order, the cost + shipping would probably be prohibitive (not to mention the fear of the packet getting lost on the way).
On a different (but related) note, I had a discussion with Constantin Udalov a couple of years ago and told him how I wished his books could be translated into English or French for the rest of the world to enjoy. At some point the concept of an English-language book on Beriev was seriously discussed, and I even made steps towards a renowned author on Soviet aircraft to make sure this would not interfere with any of his current projects... Not only it didn't, but he kindly offered to provide any help he could to facilitate the project.
Unfortunately, with me not speaking Russian and Constantin not being too fluent in English, it meant that he had to translate everything into approximate English, which I then had to turn into proper English, only to resubmit it to him to see if I'd got his meaning well... and then probably retranslate the whole thing into French for local publication as articles, since an entire book on the subject might not have been commercially viable. It was all too complicated, and we left it at that... but I deeply wish there could be some serious investigation by a Western publisher to produce some adaptations, condensed versions at least, because Avico has access to all the company records for Myasishchev, Beriev and a few others and the books are definitive on every subject they tackle.