Latvian-learning-book recommendation

If you want to learn latvian, I can highly recommend you the book ''Latvian in three months''.
It's written by Dace Dumpe, and it's published by ''Zvaigzne ABC''.
Right now, I'm only using this book for learning latvian, and I really like it. I'll give you a list of pro's and con's.

Pro's:

-Price: under 20 €; totally okay for a language-learning book
-Weight: you can put it in (almost) every purse
-Simplicity: easy to understand, even for a German
-Learn effect: good
-Use: everyday-life-language; that's perfect
-Exercises: good; possibility to check your solutions

Con's

-Some mistakes in the translations, also some mistakes in the exercises (but you normally easily find them)
-No CD (better for learning the language IN Latvia)
-The title: it's a lie. It's impossible to finish this book during three months. i'm using it for about four months (actually three months active use for one or more hours per day), and I'm only half finished
-English is a simple language, which means that every other language is hard to explain in english. E.g. the cases (they have 7 in Latvian), they don't exist in english, so the book starts from zero. But still, my latvian class teacher told me it's very good for an english latvian-learning-book


Suggestion:
Buy this book before you buy another, try if you can work with it, and if not, sell it again and buy another


Good luck with learning Latvian!