The Vayus system is an ancient Yogic practice that has been lost in time. Only few obscure descriptions in Sanskrit texts were left of this profound method.
Years of research have led international yoga teacher, Orit Sen Gupta, to unravel the mysteries of this powerful practice. New realms of consciousness and knowledge of the body open up, as the ten vital vayus, connecting body and mind, are discovered.
In “Vayu's Gate”, the subtle and far-reaching techniques of the vayus are brought to life again. A detailed and illustrated description of vayu practice in pranayama and asana is provided, enabling yoga practitioners of all levels to experience the inner presence of the vayus and to adopt the vayus into their own practice, investing it with a new dimension.
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Look Inside The book:

You can read the introduction
You can view the book contents 
You can read a page sample about  backbends and Vayus
You can read a page about Using the Vayus as a Tool for Correcting Alignment