"Understanding Second Language Acquisition" by Lourdes Ortega, published in 2009 by Hachette Learning, is a comprehensive textbook on linguistics and general language arts. The trade paperback format makes it convenient for reading and studying in-depth concepts related to second language acquisition. Written in English, this textbook covers a wide range of topics and theories in the subject area, providing valuable insights for language enthusiasts and students looking to deepen their understanding of language acquisition processes. Highlights throughout.