a decent book to help learn Estonian?

no idea about decency but the only ones I found:

http://www.raamatukoi.ee/cgi-bin/raamat?166793

http://www.raamatukoi.ee/cgi-bin/raamat?157080








Does anyone know any possibility to learn Estonian online? Or a decent book? Or a good Estonian bookstore to ask?
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photo by Ian of the New Arched Bridge over the Unpronouncable Emajõgi in Tartu 2010