The Zorks didn't use speech, at least Zork 3 didn't and I'd imagine if any did, that would. I also think it's an odd choice for an Amiga book since it's the same as it ever was on all platforms, even the 64. Good game? Probably, but good Amiga game? Eh..not really. And it was popular, sure, that's considering it was on practically everything. I'd even wonder just how much it sold on the Amiga since someone would have had to miss it on everything else. Doesn't make for good screenshots either.
Leaderboard Golf isn't quite as good as I remember it.. Used to play it a lot on the 64, but the Amiga version is odd.. Too fast/hard maybe.
The others on the list are either very good picks or I'm not familiar with them. The Pawn is a good choice, too; as I remember it, it was groundbreaking for its graphics (even on other systems) for an adventure.