What else is there?
University of Kansas. Cultural readings, audio, vocabulary, grammar.
Gramática para la composición
A book more serious students really like.
Language Lab Unleashed
More for educators than students, but it does discuss resources and study strategies.
Cultural podcasts for language learners, interesting and smart.
Spanish Grammar in Context
University of Texas. Grammar explained, using examples from current Texan Spanish.
A guide to contemporary usage, very good.