Mantilla's Reciprocal Method For Learning Spanish Or English: Metodo Bilingue Para Aprender El Ingles Y El Espanol is a language learning book written by Luis Felipe Mantilla and first published in 1869. The book provides a unique and innovative approach to learning Spanish and English, using a reciprocal method that allows learners to simultaneously study both languages. The book is divided into two parts, with the first part focusing on Spanish...