A theft and a hold-up, an impostor trying to collect an inheritance, the disappearance of a lab mouse worth several hundred thousand dollars, and a number of other cases : these are the investigations led by Maurice Manori, a police inspector known for being quick on the draw. He owes his reputation to his highly effective (but very unconventional) methods. His secret weapon? Graph theory. In search of the truth, Inspector Manori draws graphs that will introduce you to the ins and outs of a mathematical discipline with countless handy applications. This novel provides the layperson with an excellent breakdown of a science that's not very well known, using it to model a wide range of everyday situations. Thanks to its fun approach, it's great for both Sudoku and logic puzzle lovers and for math and science students and teachers. Bad guys take note : Manori is watching, and he's quick on the draw ! Alain Hertz has a lot in common with Inspector Manori. He studied in Switzerland, he lives in Montreal, and above all, he's been immersed in graphs for some 25 years. He holds a doctorate in science from École Polytechnique Fédérale de Lausanne. An internationally renowned researcher, he has more than 150 publications to his credit, most of them dealing with graph theory. He applies the science mainly to the fields of schedule-building and logistics system optimization. After conducting research in Jerusalem and Lausanne, he moved to Montreal in 2001, where he is a professor in the Department of Mathematics and Industrial Engineering at Polytechnique Montréal. His mission is to convey his passion for graphs by promoting them all over the world, especially by making them interesting and accessible to everyone.