***THIS BOOK IS IN SPANISH ONLY. *** Through 50 'nuts' of language and related grammatical notes, this book offers the reader a practical and theoretical overview of Spanish grammar presented in a unique and entertaining way. 50 small language problems are presented in the first part of the book, followed by corresponding 'nuts' which cover many of the most important issues in Spanish grammar. Each 'nut' includes supporting exercises to test the comprehension of the reader. These 50 sections are presented in a logical, systematic order and are intended to answer the most common questions which occur when Spanish learners cover each topic. The second part of the book contains further grammatical notes presented in the didactic manner and aim to give a solid theoretical basis to the reader to enable them to resolve all of the exercises without difficulty. ***THIS BOOK IS IN SPANISH ONLY. *** 50 nueces de lengua y unas notas de gramatica permite al lector realizar de forma amena un repaso practico y teorico de gramatica espanola. En la primera parte del libro se presentan 50 pequenos problemas de lengua o nueces de lengua que cubren algunos de los temas mas relevantes en gramatica espanola. Cada nuez se acompana de unos ejercicios de apoyo que ponen a prueba la destreza del lector. Los temas tratados estan ordenados con la intencion de que exista una continuidad y las nueces plantean las cuestiones mas frecuentes dentro de cada tema. La segunda parte son unas notas de gramatica que exponen de forma didactica el soporte teorico necesario para que el lector pueda resolver todas las actividades sin grandes dificultades.