content: I bought this along with the authors' grammar reference, which has proven an expensive mistake. The two are college level texts and probably quite good for those engaged in intellectual pursuits. I, on the other hand, teach ESL as a volunteer and was simply looking to shore up my practical knowledge of the subjects. Both texts contain virtually no such information. In fact, they assume a significant knowledge of linguistics and linguistic theory; they are literally packed with obscure jargon that I presume familiar to some set of initiates but certainly far beyond my ken. If your situation is analogous to mine, I suggest Side by Side Spanish & English Grammar and Practice Makes Perfect English Pronouns and Prepositions--much less expensive ($30 the pair I think) and much more practical.