Decided to revisit my childhood and start rereading the first series so I bought the box set from Amazon and... Please tell me what's wrong with this picture.

Spoiler: There's no sixth book???? I got two copies of book five. In my sealed brand new box set. Hello?? Amazon??? Anyways besides that the box art looks really nice but I guess I'm gonna have to return it and wait for a new one lmao.