| Quite right, the core book to get you started and to ensure that your players will like the game is all you really need. Not everyone will like the horror aspects of the game or the danger of combat.
As Elsenrail elaborated upon my post: different people will suggest different books, it is an ongoing debate on the Black Industries forums. After the core book it might be handier to find a store that sells the books and thumb through to see what you need to fit your group better.
Most people will agree that you do not need the Paths of the Damned adventure series. You are much better served by getting the core book and downloading a free adventure from the Black Industries website. Warhammer v2 has some really good detail and handy rules, but for some reason the official adventures are lacking in many ways. I bought them for the additional rules and careers, the adventures themselves are very contradictory and non-linear as to be nonsensical at times.
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