The 20-year-old striker has moved to Highbury on a season-long loan, becoming the club’s third signing of the summer in the process.
“I’ve known the gaffer a while,” said Edmondson.
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“When he was at Leeds, I was a Leeds fan so I’ve seen the way he works, I’ve seen what he’s about, and when I’ve spoken to him, he’s sold the club really well to me.
“He’s told me the way he wants to do things, the way he wants to play, things like that. It suits me to a tee.
“It’s a great club, a great family club, and I can’t wait to get going.”
An England U19 international, Edmondson spent time on loan at Aberdeen last season prior to joining Northampton.
As he explained, it was a face-to-face chat with Grayson which sealed the move.
He said: “I met him over in Wetherby and we had a coffee.
“He’s been watching me for a while now and he explained he could see the positives in my game at Northampton.
“Unfortunately it didn’t work out there. With the position they were in, it was a bit of a struggle and it didn’t really let me express how I play and reach my potential.
“He wants to expose that and show people what I can do. I can’t wait to give them my overall game, score a few goals and see where we can end up.”
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