Leo Hartas's fine fantasy maps. In fact, I see he even signed it, so that'd be the tip-off then.
Stayng Island (named after Jamie's shirt front when he's been eating spaghetti bolognese) was the setting for Fighting Fantasy book 43: The Keep of the Lich Lord - the only one that I wrote. Or co-wrote, rather. The adventure involved a commando raid on an undead warlord's fortress. Jamie did the first 200 paras up till the fortress gate, I wrote the rest. (More or less, though we no doubt did little extra bits in each other's section to make sure it all meshed together.)
When Icon Books started republishing the FF series, Jamie and I kept the rights to Lich Lord. You may even have seen the Megara app a few years back that was loosely based on it. Now we're thinking about republishing it, probably whisking it out of FF's world of Alan and dropping it down someplace in the Violet Ocean. Maybe right in the middle. That way, everybody who says there are no complete adventures (really?) in Over the Blood-Dark Sea will have to eat their words.
The only hold-up is artwork. Megara produced some nice full-colour illustrations for the app, but those were fairly low-res and I don't know how well they would reproduce in black and white. Also, we don't have a cover and, much as I'd like to get original FL artist Kevin Jenkins to do one, he's far too busy (and expensive) these days. But those hitches aside, I think you'll be seeing this back in print before too long.