Quantum of Nightmares (UK link) comes out on January 11th in the USA and January 13th in the UK. It's the second New Management novel, and a direct sequel to Dead Lies Dreaming.
If you want to buy the ebook, you're fine, but if you want a paper edition you really ought to preorder it now.
The publishing industry is being sandbagged by horrible supply chain problems. This is a global problem: shipping costs are through the roof, there's a shortage of paper, a shortage of workers (COVID19 is still happening, after all) and publishers are affected everywhere. If you regularly buy comics, especially ones in four colour print, you'll already have noticed multi-month delays stacking up. Now the printing and logistics backlogs are hitting novels, just in time for the festive season.
Tor are as well-positioned to cope with the supply chain mess as any publisher, and they've already allocated a production run to Quantum of Nightmares. (Same goes for Orbit in the UK.) But if it sells well and demand outstrips their advance estimates, the book will need to go into reprint—and instead of this taking 1-2 weeks (as in normal times) it's likely to be out of stock for much longer.
Of course the ebook edition won't be affected by this. But if you want a paper copy you may want to order it ASAP.