Full details of the book can be had from Peter Wyzlic's indologica.de website.
Yogini Sunita's Pranayama Image
Yogini Sunita published a book in 1965 called Pranayama, The Art of
|Yogini Sunita's signature|
Yogini Sunita's illustration has been reproduced almost endlessly in books and now on the internet, and there are multiple modifications and interpretations. One of the more common is a negative version, with white lines on a black background. Others are coloured, simplified, and interpreted in various creative ways. It appears in various contemporary yoga-themed mashups. The word प्राणायाम is often masked out. The image is often shown as a representation not primarily of breath control, but of the nodes and tubes of the spiritual body (cakras and nāḍīs).
Suzanne Newcombe describes how Yogini Sunita's early death meant that her methods and ideas did not spread as widely as those of other 20th century yoga teachers. Nevertheless, the Pranayama illustration from her 1965 book has become one of the most widely-known images of yoga in the 21st-century (Google images).
Update, July 2014: now see part 2 of this article