It had to happen. Desperate for more material, Puffin Books started accepting outside book submissions into the #FightingFantasy #gamebook line, and here is their first definite misstep. #SpaceAssassin used the very first book as a blueprint, not accounting for any developments since then. Worse, it is not even remotely a good imitation of the original. Don't worry, Andrew Chapman's books improved a lot later on.
https://www.goodolddays.net/game/id%2C1560/Space-Assassin.html