I you wait for a while you will be able to download it from Bhikkhu Analyo's website:
https://www.buddhismuskunde.uni-hamburg ... alayo.html
He appears to enter into contracts that allow free distribution after a time.
Currently you can download (among many other interesting books and articles):
Satipaṭṭhāna, the Direct Path to Realization,
Birmingham: Windhorse, 2003, 319 pages.
Perspectives on Satipaṭṭhāna,
Cambridge: Windhorse, 2013.
Compassion and Emptiness in Early Buddhist Meditation
, Cambridge: Windhorse, 2015.
Early Buddhist Meditation Studies
, Barre: Barre Center for Buddhist Studies, 2017
The latter is a useful reference for "issues" about mindfulness, the gradual path, absorption (concentration) and the Brahmaviharas. He addresses issues such as whether insight and absorption are two paths or two aspects of the gradual path, whether the noble truths are a practice regime, whether one can practice insight while in jhana, whether the Brahamaviharas provide a complete path, and so on. Even if you disagree with his conclusions, the comprehensive references to Pali, Sanskrit, Chinese, and Tibetan discourses will be useful!