I learned more with this work only after a cycle evening classes (beginners course) NPHS Arles. Point esoteric logorrhée on playing back images but just enough technique and very pragmatic advice. Some may consider that there are developments on evidence ... Perhaps, but there are evidences that it is good to remember to question yourself. Congratulations Anne-Laure! (You permit me to call you Anne-Laure?) I illico control your second book.