Palden Sherab Opening Door to Our Primordial Nature (PDF)

This is a comprehensive book that teaches almost everything one needs to know about meditation: Below are some of the Chapters:

Taming the Mind The Causes and Conditions of the Mind,
Taking Refuge Training in Discipline, Concentration, and Wisdom
Cultivating Bodhichitta Loving-kindness
The Inseparability of Compassion and Emptiness 
The Channels and Winds Meditation Posture and Breath Purification   
Meditating on the True Nature of the MindT
The Five Supports of Meditation  Shamatha and Vipashyana 
and Ngondro Practice Vajrayana Meditation
Guru Padmasambhava  Guru Yoga Practice  and Advice on Visualization