 At its peak, 365portraits.com had approximately 20,000 visitors per day and has been widely imitated.His subjects included Apollo astronaut Buzz Aldrin, politico Tucker Carlson, Grammy award-winning singer-songwriter Imogen Heap, essayist Geoff Dyer, Lord Bath, Humanitarian Terry Waite, photographer Timothy Greenfield-Sanders, TV personality Mo Rocca, historian James Burke, adult film star Nicole Sheridan, activist Chelsea Sexton, and physicist Brian Greene.A limited-edition book was released which contained all 365 portraits.