The book shown is titled "Manual Clínico de Otorrinolaringología" (Clinical Manual of Otorhinolaryngology) by Héctor de la Garza. It is published by Manual Moderno and JGH Editores. Otorhinolaryngology is the branch of medicine that specializes in the diagnosis and treatment of ear, nose, and throat (ENT) conditions. The book likely serves as a clinical manual for medical professionals and students in this field.