This is the Georgetown Cardigan from Knitbot's (Hannah Fettig's) Home and Away book. You can also buy the cardigan pattern by itself. This book is a treasure trove of simple basics. It also contains the pattern for the Lesley pullover I knitted in the spring.
Roxy's Yarns in Tampa while out with my mom. I told her I wanted to make a gray cardigan, and she encouraged me to keep it simple so I would wear it a lot. Excellent advice. I have brought it on my travels this summer and am wearing it constantly.