I'm reading Harry Potter and the Deathly Hollows. I just read about Harry asking the man who made his wand (Olivander) if he could mend his wand because it broke. He said "no once a wand is broken it is broken. Then Harry asks him about the deathly hollows (which you must read the book to find out about) He said I do't know what your talking about. that was that.
P.S To know about the mouth dropping secrets I would't tell you about read Harry Potter and the Deathly Hollows.
P.P.S Read books 1-6 first.