Kalu Rinpoche Gem Ornament of Oral Instruction (PDF)

In this book Kalu Rinpoche teaches on the three vehicles (Foundation, Mahayana, and Vajrayana), then goes through the four Preliminary (Ngondro) Practices (Prostrations, Vajrasattva, Mandala, and Guru Yoga) practices. He also explains the layperson's vows, the Bodhisattva vow, and the tantric vows.  Finally, he gives a good description of Shamatha and Mahamudra meditation.