And I for one cannot wait!
http://www.bbc.co.uk/news/uk-38978023
The new trilogy is called The Book of Dust and the first novel will come out in October, 17 years after the last instalment.
He says the books are an "equel", rather than a prequel or sequel.
The series will return to the story of Lyra Belacqua, and will begin when the heroine is a baby, and move on to when she is 20 years old.
"People say, 'Is it prequel? Is it a sequel?' Well, it is neither," said Mr Pullman, speaking to BBC Radio 4's Today Programme.
"It's an 'equel'. It's a different story which begins roughly 10 years before His Dark Materials and ends roughly 10 years after."
With this, and the BBC adaptation coming up at some point soon-ish, I think I need to get the trilogy off the shelf and give them another read through at some point.