damenunterwaesche.org

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This is a pretty good book, for the price. It has useful language themes (travel situations, practical things) and many good sample dialogs to model your language use on. The layout is visually appealing. Its coverage of grammar is a bit skimpy. Yes, it's very simple, but they may have gone too far. There is no grammar index so it's hard to locate various grammatical explanations. The past verb tenses are not explained in the book, which I think is a deficiency. There are a few typos, too.