In the pages of this diary, Caroline Simonds, a.k.a. Dr. Giraffe, the founder of the association Le rire médecin (Healing Laughter), recounts a year spent in a pediatric hematology unit, the start of her collaboration with hospital staff, and the fates of the children and teens she saw every day. Silliness is de rigueur; seriousness and absurdity commingle in this firsthand account. Readers will be moved to laughter and tears, admiration, and a deep belief in the absolute necessity of humor in such a setting. Reda Kateb's film On the Edge (Sur un fil) was based on this book.