The answers to these questions, and more about the secretive fifth book, have been revealed by Harry Potter's American publishers Scholastic.

The info comes from a summary about the fifth book, The Order of the Phoenix, in a catalogue of Scholastic's summer and autumn releases.

SPOILER WARNING - if you don't want to know any plot details about the next Harry Potter book, stop reading NOW!!!

Really, don't go any further if you don't want to know anything!

Ron Weasley will be the new Gryffindor Keeper and Harry has terrifying dreams of a single door in a silent corridor.

The news was broken on Wednesday by leading fansite The Leaky Cauldron.

It adds to what we already know about Book Five, such as:

• The Defence Against The Dark Arts teacher will be a woman
• Professor Lupin will be back along with "a lot of old friends"
• We'll have a new Sorting Hat Song
• We'll see "a bit more" of characters like Mundungus Fletcher.