Hewson Consultants, created in 1980 by Andrew Hewson, did publish several good games on Amstrad CPC like Uridium, Paradroid, Nebulus, Firelord, Stormlord and Cybernoid, but not only.

Available on their site web, a book (epub or not) as pre-order, and 11 incredible tracks from 10 classic Hewson games, remade by legendary artists (reduction of 40% with the code retrogamer on Bandcamp).