Genki 2 follows on from the very popular Genki 1 and is presented in exactly the same way. Once you have finished studying Genki 1 and 2 you have a thorough foundation in the Japanese language to built on for further study. In my teacher's opinion, there is no better course to learn Japanese with and she has been teaching for more than 35 years! It would be best to use the Genki series with a teacher; for self-study alone it would be better to have some knowledge of Japanese beforehand. However, if you get the CDs, workbooks, answer booklet and textbooks, self-study is definitely possible with Genki. There is also a website with more exercises to try. Ganbatte!