Russian is an East Slavic language and an official language in Russia, Belarus, Kazakhstan, Kyrgyzstan and many minor or unrecognised territories throughout Eurasia (particularity in Eastern Europe, the Baltics, the Caucasus, and Central Asia). It is an unofficial but widely spoken language in Latvia, Moldova, Ukraine and to a lesser extent, the other post-Soviet states and former members of the Eastern Bloc.
Russian belongs to the family of Indo-European languages and is one of the four living members of the East Slavic languages (which in turn is part of the larger Balto-Slavic branch). Written examples of Old East Slavonic are attested from the 10th century and beyond.
It is the most geographically widespread language of Eurasia and the most widely spoken of the Slavic languages (followed by Polish and then Ukrainian). It is also the largest native language in Europe, with 144 million native speakers in Russia, Ukraine and Belarus. Russian is the eighth most spoken language in the world by number of native speakers and the seventh by total number of speakers. The language is one of the six official languages of the United Nations. Russian is also the second most widespread language on the Internet after English.
Please pay attention, the below books are all English Version. （请注意下面的PDF文档的语言均为英语）
文档编号：InfoLang0041 (Colloquial Russian The Complete Course for Beginners)
文档编号：InfoLang0042 (Teach Yourself Russian)