One of the best books for meditation is "Fully Present" by Susan Smalley and Diane Winston. It's written by the founders of the UCLA Mindful Awareness Research Center. They also offer a fantastic online meditation course.
Above is link to a free ebook on meditation. Wrote by Dr Thynn Thynn. Very popular book in the East, almost unknown in the West. Just another choice for you or just for fun reading.
Check in the "Learn to Meditate" site. Looks like it has various techniques of Yoga, including the Energization Exercises and the The Hong Sau Technique. See the below link.