Bests & Worsts Reviews from Amazon

I’m Hispanic and I speak Spanish fluently 100%, I’m looking for a guide for my family to practice their Spanish, this books seems like a good idea, except that it has a bunch of grammar and expressions really incorrect, if you are looking to learn Spanish with you kids, you’re going to finish speaking really bad Spanish, not even getting to the first lesson I found a lot of mistakes. And this point I’m just going to used it as a guide but it has poor Spanish, the author doesn’t seem to be a certified translator, in fact she said in the introduction she only knows 80%, who authorized this book to be published? But the author had a good idea just not good Spanish.