"I know about Gary's affiliation with Coventry City and while that's a very positive thing, we are bringing him in because of his qualities as a player and a character, not just because he is a local lad," Coventry manager Aidy Boothroyd said.
"We feel he will be a very good addition to the squad and all Coventry City supporters will know that Gary McSheffrey in his pomp is an outstanding player in the Championship.
"His last couple of seasons have not seen him hit the peaks that he did here at Coventry or in the year he was instrumental in winning Birmingham promotion.
"But we have brought him back with the aim of getting him and us back up to that level."
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