Ws at the Salon du livre last week and stunble upon a macaron cookbook made but the owners of Maison du macaron and I absolutely love. I always thought it was hard and daring but everything is well explainded and simply put. Tried the blueberry ones and the filling was really good but my shells were so-so. Tried the chocolate one the next night and the filling was amazingly rich and the shells were almost perfect. Not as good looking as at the shop but still very satisfying. The book (in french) is highly recommended.