Delighted to say!
You fabulous book is has just been released in North America!
Here’s the US link – https://bookshop.org/p/books/the-hush-kit-book-of-warplanes/20294418?ean=9781800180949
Here’s the Canadian link
https://www.indigo.ca/en-ca/the-hush-kit-book-of-warplanes/9781800180949.html
