Reddit reviews The Key Poses of Yoga: Scientific Keys, Volume II

The Key Poses of Yoga is a great resource.

EDIT: And also Hatha Yoga Illustrated.

I love this book for understanding the physical practice
http://www.amazon.com/The-Key-Poses-Yoga-Scientific/dp/1607432390/ref=sr_1_2?ie=UTF8&qid=1396563465&sr=8-2&keywords=yoga+pose+books

For the ethical/discipline base of yoga, this is a short, easy, and really helpful read. Non-harming, non-clinging, etc.

http://www.amazon.com/Yamas-Niyamas-Exploring-Ethical-Practice/dp/0974470643/ref=sr_1_1?s=books&ie=UTF8&qid=1396563657&sr=1-1&keywords=the+yamas+and+niyamas+by+deborah+adele

For the pure philosophy, I'm a fan of this book on Tantra(where yoga came from). It's overwhelming the first time through, but there is so much powerful knowledge locked up in here
http://www.amazon.com/Tantra-Illuminated-Philosophy-Practice-Tradition/dp/0989761304

This is a great book on mindfullness with some applicable meditation techniques framed for the modern day, but it's all based on ancient teachings

http://www.amazon.com/Search-Inside-Yourself-Unexpected-Achieving/dp/0062116924/ref=sr_1_1?ie=UTF8&qid=1396563508&sr=8-1&keywords=search+inside+yourself

Also, the Chakra system is fascinating and Anodea Judith offers some guided meditations. This book is really helpful and accessible

http://www.amazon.com/Wheels-Life-Chakra-System-Llewellyns/dp/0875423205

And, diet. This book helped me shift my diet in a way that's been extremely helpful
http://www.amazon.com/Eat-Taste-Heal-Ayurvedic-Cookbook-Modern-Living/dp/0976917009/ref=sr_1_1?s=books&ie=UTF8&qid=1396563932&sr=1-1&keywords=eat+taste+heal

These have been some of the most influential books in my practice. Hope they help!

I'll also throw out that there are some great books on yoga, I like The Key Poses of Yoga by Ray Long and Yoga: The Iyengar Way a lot. The former has really good pictures that show what muscles should be engaged, and how, in each pose. The later has a lot more about the mind state you should strive for during Yoga (including how to breath and move between poses) and it has a large number of "courses" in the back. I think there's over a year's worth.
I hope some of that is helpful. I grew up in a household that really loved yoga and I've been slowly reintegrating it into my life now that I'm supposedly an adult.

If you dont mind a little anatomy, i suggest the key poses of yoga . It was (and still is) an eye opener for me. Not really a set of sequences for every day, but a very good source to look at yoga from a little different perspective

https://www.amazon.com/Key-Poses-Yoga-Scientific-Keys/dp/1607432390

And also the key muscles of yoga