Rotherham United sign Matt Crooks from Northampton Town
It's the first piece of transfer-window business done by manager Paul Warne who is also hoping to add a striker and a winger to his squad.
He made more than 50 appearances for the Cobblers, netting 10 times, although he missed both matches against Rotherham as Warne's side won promotion from League One last season.
His 23 outings this term have brought six goals, including a hat-trick at Macclesfield Town in October.
The 24-year-old, who can also play in defence, passed a medical earlier today.
The clubs reached an agreement after spending a week in negotiations.