have recently got the book and my daughter and I are both using the advice . . . however am having problems obtaining with Sothy's Retinol 15 or Topix Replenix Retinol Smoothing Serum . . . I understand that these are american products and we live in the uk . . . are there are any uk outlets that would sell either of these products . . . preferably online? . . . look forward to hearing from someone . . .