Cursed City is the new big-box expansion for Warhammer Quest. Grab your team and head into the dark alleyways of Ulfenkarn, seeking out the undead menace that threatens everyone with a pulse. You can head over to the GW webshop and put your name on the list to pick up your copy now.
Edit to add: apparently, they're temporarily out of stock online. So, perhaps ask your LGS if they have some coming in for you.
From the announcement:
That’s right – Warhammer Quest is back with a brand new edition, and it’s available to pre-order RIGHT NOW. Here’s a reminder of what’s in Warhammer Quest: Cursed City, along with the accompanying goodies that are also available to pre-order today.