Childhood and gymnasium years of Lion of Абрамовича Кассиля coincided with events that shocked the whole world : First world war and revolution 1917 year in Russia. In a story "Conduct-book and Швамбрания" an author calls to own child's experience and tells about events he and his family participated in that. There is all: both taking breath away adventures and hilarious tricks, and remarkable historical sketching of Russia of beginning centuries..At the end of winter 1914 year leaving punishment for a corner the high school brothers-students of Леля and Оська unexpectedly for itself open the Great state of Швамбранское, located on the mainland of Large Tooth, inhabit him heroes and play this magic game many years. And yet it is a story about high school students and their school life, about tricks and pranks.The charming and unique humour of Leo Кассиля most full declared oneself exactly in it stories.