If you want to study Mahamudra here is a list of books to get started. I can recommend nummer 3, 5 & 22.
1 Wild Awakening: The Heart o… Wild Awakening: The Heart of Mahamudra and Dzogchen by Dzogchen Ponlop
2 Mind at Ease: Self-Liberati… Mind at Ease: Self-Liberation through Mahamudra Meditation by Traleg Kyabgon
3 The Gelug/Kagyu Tradition O… The Gelug/Kagyu Tradition Of Mahamudra by Dalai Lama XIV
4 The Practice Of Mahamudra The Practice Of Mahamudra by Drikung Kyabgon Chetsang Rinpoche
5 Mahamudra: The Moonlight –… Mahamudra: The Moonlight — Quintessence of Mind and Meditation by Dakpo Tashi Namgyal
6 The Union of Mahamudra and … The Union of Mahamudra and Dzogchen by Chokyi Nyima
7 Mahamudra Teachings of the … Mahamudra Teachings of the Supreme Siddhas by Si-Tu
8 Lamp of Mahamudra: The Imma… Lamp of Mahamudra: The Immaculate Lamp that Perfectly and Fully Illuminates the Meaning of Mahamudra, the Essence of all Phenomena by Tsele Natsok Rangdrol
9 The Third Karmapa’s Mahamud… The Third Karmapa’s Mahamudra Prayer by Tai S. Rinpoche
10 A Spacious Path to Freedom:… A Spacious Path to Freedom: Practical Instructions on the Union of Mahamudra and Atiyoga by Karma Chagme
11 Garland Of Mahamudra Practices Garland Of Mahamudra Practices by Kunga Rinchen
12 Mahamudra and Related Instr… Mahamudra and Related Instructions: Core Teachings of the Kagyu Schools by Peter Alan Roberts (Translation)
13 Naked Awareness: Practical … Naked Awareness: Practical Instructions On The Union Of Mahamudra And Dzogchen by Karma Chagme
14 The Influence of Yogacara o… The Influence of Yogacara on Mahamudra by Traleg Kyabgon Rinpoche
15 The Eighth Situpa On The Th… The Eighth Situpa On The Third Karmapa’s Mahamudra Prayer by Si-Tu (Translation)
16 Perfect Clarity: A Tibetan … Perfect Clarity: A Tibetan Buddhist Anthology of Mahamudra and Dzogchen by Erik Pema Kunsang
17 Cloudless Sky: The Mahamudr… Cloudless Sky: The Mahamudra Path of the Tibetan Kagyu Buddhist School by Jamgon Kongtrul
18 The Collected Works, Vol. 5… The Collected Works, Vol. 5: Crazy Wisdom / Illusion’s Game / The Life of Marpa the Translator (excerpts) / The Rain of Wisdom (excerpts) / The Sadhana of Mahamudra (excerpts) / Selected Writings by Chögyam Trungpa
19 Confusion Arises as Wisdom:… Confusion Arises as Wisdom: Gampopa’s Heart Advice on the Path of Mahamudra by Ringu Tulku (Editor)
20 An Ocean of the Ultimate Me… An Ocean of the Ultimate Meaning: Teachings on Mahamudra by Thrangu Rinpoche
21 Pointing Out the Dharmakaya Pointing Out the Dharmakaya by Khenchen Thrangu
22 The Ninth Karmapa’s Ocean o… The Ninth Karmapa’s Ocean of Definitive Meaning by Khenchen Rinpoche Thrangu
23 Vivid Awareness: The Mind I… Vivid Awareness: The Mind Instructions of Khenpo Gangshar by Thrangu Rinpoche