Some PS Vita games will not come with physical manuals
Inside Games has a PlayStation Vita game early and has shared some photos of its contents which you can see after the break. It seems that this particular game (the game is not specified) does not come with an instruction manual. An in-game manual is used instead.
Of course this doesn’t go for all games. It looks as if Uncharted: Golden Abyss will come with an instruction manual.