This volume of the series "In the footsteps of V. B. Shavrov" is entirely dedicated to one of the first aircraft designers of Russia. Gakkel was the second designer whose Russian-built airplane took to the air. It was a Gakkel-3 bi-monoplane that did not repeat any foreign design. The book contains a lot of new material that has never been published before. I was pleased to read this wonderful work by aviation historian K. Udalov.