For me, perhaps the best volume of Dari Mackenzie adventures and more personal. First, the investigation and perhaps the truth about one of the greatest mysteries of lalchimie recent centuries, smoothly conducted by hyper human characters and endearing. An impressive research work and you like them brilliantly distilled and which features a gallery of real people of the time, their links and their unsuspected activities. (Whether or not lon sy know in this area, a revelation that should make some noise in the middle!) Besides the investigation, we feel the implication of the author in the defense of several topics that are dear to him: the situation of libraries in France, the importance that it attaches to friendship, to lhumain and romantic feelings, his taste for humor both subtle and corrosive, and a real sensitivity in the writing. The suspense, that he is on resolving the investigation or lissue the relationship between Lola and Ari, lasts until the last page and closed the book reluctantly. An erudite novel, which made us laugh and shiver at once. What more? Henri Loevenbruck of history is a wonderful storyteller.