This is a Google Book. It is the entire digitized version of "Persian Grammar", by A.K.S. Lambton. It is a very scholarly, 330-page book that explains it's subject in great length and detail, providing loads of examples in the process.
At the end of the book are several lessons students can follow.
Comprehensive, accurate, complete and scholarly, and contains sufficient reading matter to enable the student to handle the language for himself.