Start with high-confidence theravada buddhism books, then narrow by subgenre or adjacent topics.
The Middle Length Discourses of the Buddha
Bhikkhu Nanamoli, Bhikkhu Bodhi
The Long Discourses of the Buddha
Maurice Walshe, Venerable Sumedho Thera
In This Very Life
Sayadaw U Pandita, Kate Wheeler
Food for the Heart
Chah
The Numerical Discourses of the Buddha
Bhikkhu Bodhi, Gautama Buddha
The Suttanipata
Bhikkhu Bodhi
Mindfulness and Insight
Venerable Mahasi Sayadaw
The Signless and the Deathless
Bhikkhu Analayo, Bhante Gunaratana
The Jhanas
Shaila Catherine
The Essential Buddhadhamma
Bhikkhu P. A. Payutt, Bruce Evans
Voices of Siam
Bruce Evans, Buddhadasa Bhikku
The Dhammapada
Dr. Max Muller, F. Max Müller
Theravada Buddhism - Simple Guides
Diana St. Ruth, Richard St. Ruth
Dhammapada
Gautama Buddha
