Please help me find a gamebook series from my childhood

Hi I've been trying to search for possibly an obscure gamebook series from my childhood. I have very sketchy details as this was around 30 or so years ago.

I think there were 4 gamebooks in the series.

One had a very scary cover with a dune like worn albeit with a frightening face.

The one I borrowed from my library in the UK was based in an Aztec setting where you would prepare for your adventure before setting off.

I remember finding these on the home of the underdogs in the early 2000s although obviously that doesn't exist anymore.

Any help much appreciated!!