Featuring original works by two Brits (Gary Hume and Rachel Whiteread) and two Americans (John Baldessari and Ed Ruscha), it's a hands-across-the-water kind of affair. And that's reflected in the various causes the artists have selected to benefit, too. Hume's pick, The Kids Company, provides support to vulnerable inner-city children and is based in the U.K. Ruscha, whose cheeky works are pictured here, chose The Bill Foundation, which rescues pooches from the L.A. shelter system and places them in permanent homes. Available in two portable sizes (the 5.5" x 7.5" Mayfair, $810, and the 3.5" x 5.5" Panama, $630), the Diaries will hit Smythson's New York and Beverly Hills stores mid-October.