I remember a book from my childhood (i.e. probably at least 20-30 years old) that was an encyclopedia of imagined near-future spacecraft. It was written as if those craft existed.

This wasn't a work of prose, it was a hardback book in the style of an encyclopedia with lots of illustrations. It could almost be described as a simplistic technical manual of the craft and tools.

It describes spacecraft as they might have been had the Apollo project continued - craft for landing on the moon and starting to build space habitats there.

Can anyone help me identify this please?