Crook missed last weekend’s opening win over Gloucestershire Gladiators due to a fractured finger, an injury he picked up in the LV= Championship defeat at Lancashire.
The squad is 13 strong and otherwise unchanged from Friday’s emphatic 41-run win.
Kyle Coetzer and David Murphy are both available after their midweek international duty with Scotland, with Coetzer maintaining his run of good form by smashing 57 in his country’s win over Kenya.
Overseas signings Richard Levi and Cameron White also play, as does loan man and left-arm spinner Graeme White who will be on a high following his match-winning haul of four for 14 against Gladiators.
The weather forecast for Northampton is good for Friday night, and tickets are still available.
They can be bought online at www.northantscricket.com until midnight tonight, and on the gate on arrival tomorrow.
Steelbacks squad: Richard Levi, Kyle Coetzer, Cameron White, Alex Wakely, David Willey, Matt Spriegel, Andrew Hall, David Murphy, Graeme White, Lee Daggett, Muhammad Azharullah, Steven Crook, Rob Keogh