One of the things I like about a decent RPG is the depth and detail of the infomation a manual.
I love having detailed spell and skill lists, their general effects in game, some small lore details.
I realise with Game guides to sell you can't have everything about the game in a manual these days.
That and the Wiki makes it quite redundant as well.
I still find a booklet sized companion piece listing general info on races, stat uses, skills, spells and perks.
Very useful to have while playing, and can help extend game life as you can refer to it when elsewhere and think of new things to try.
So what about everyone else, what's your opinion on the humble but useful manual.