A friend just recommended this book. She wrote, "After a wildly fulfilling, soul-expanding, and community nourishing weekend, this little book is blowing up my brain."

If you're as intrigued as I am and love books on prayer, please vote here:
https://suggestbooks.uservoice.com/forums/308269-book-suggestions/suggestions/39011626-the-life-of-prayer
NB: Faithlife already carries The Mystical Element of Religion by Baron Friedrich von Hügel, which is listed in Appendix 12 of Nelson's New Christian Dictionary as among the "Most Important Books and Authors in Christian Literature."