The Spy Collection features a unique and distinct design element in its tapered and splayed legs, as well as the rounded shoulders of the chair and armchair bodies. The collection also appears to offer a variety of seating options, from dining chairs to lounge chairs and armchairs. The inclusion of a rounded bergère suggests that comfort and relaxation were also important design considerations in the development of this collection. Overall, the Spy Collection by Billiani sounds like a cohesive and well-designed range of furniture pieces that offer both style and functionality.