I don't think very fondly of Lost Souls for probably just the same reason that its devotees would give for enjoying it. The style is quite tongue in cheek, almost to the point of being a send-up, and that's not the kind of fantasy gaming I go in for. No Scottish dwarves and Monty Python clerics in my role-playing sessions, no sirree.
It began life as a serial in White Dwarf magazine, and you can read that version by starting here and following the tags. The subsequent Golden Dragon Gamebook edition was softer-edged, the hero less cynical, less opportunistic and not so arbitrarily cruel to children. You can read that version as a free PDF here. And that's the version that Fabled Lands Publishing have released in paperback this week. The blurb should give you a sense of whether it's your thing:
Beyond the hills and haunted swamps towards the sunset lies the grim castle of the arch-fiend Slank. For centuries this demon has plundered the souls of mortal men, gathering them to his terrible abode to dwell in eternal torment. Now the secret magic that can destroy Slank is known at last. You agree to undertake this perilous adventure. But can you rid the world of the demon’s dark shadow, or are you merely destined to become his latest victim?Blimey. Well, that was the tone of gamebooks in the early eighties. The flavour of the adventure is quite folklorish. If it were a Fabled Lands adventure it would be set in Golnir, probably somewhere west of Delpton. Spriggans in thorn hedges, meadows full of fairy rings, that kind of vibe.
You know, put like that, it's starting to grow on me. Not one of my best, perhaps, but maybe it deserves another look.