The Four Noble Truths by Ajahn Sumedho - free when available from Amaravati monastery, or access via https://forestsangha.org/teachings/books/authors/ajahn-sumedho?language=English
What the Buddha Taught by Rahula Walpola - contains translations of the Sutras and is organised in a way that is easy to understand.
The Zen Way : Myokyo-ni (available from Amazon )
Food for The Heart:The Collected Teachings of Ajahn Chah Author Jack Kornfield, Foreword by Ajahn Amaro. Ajahn Chah was a highly respected teacher in the Thai Theravada Forest Tradition. Ajahn Chah was Luang Por Sumedho's teacher.
The Art of Happiness (A Handbook for Living) : H.H.Dali Lama & Howard C. Cutler. An easy conversational interview with the Dalai Lama.
Hooked! Buddhist Writings on Greed, Desire, and the Urge to Consume, edited by Stepanie Kaza (Shambala)
Meditation - A Way of Awakening by Ajahn Sucitto (part 1 available as a free download from http://www.forestsanghapublications.org/viewAuthor.php?id=3
The ABC of Mindfulness. On daily dealings with everyday feelings: Jessica Wilker available at the BBG or at www.jessicawilker.com
The Heart of Buddhist Meditation. A handbook of mental training based on the Buddha's way of Mindfulness: Nyanaponika Thera available on Amazon or as E-book