Don't know the exact address, but my go to quilt store when visiting the Atlanta area is Intown Quilters. It is actually in Decatur, not a bad drive from Alpharetta. Intown Quilters is off of Lawrenceville Highway, cand is a really wonderful shop. They have tons of batiks, modern fabrics, kids fabrics, notions, and a really friendly staff. You should make it a point to visit there.