I first picked up Robert Aitken’s slim book “Taking the Path of #Zen” as a student just starting my sitting practice, some thirty-one years ago. It feels as clear and as generous now as it did the day I came to it. I hope you find it useful. https://nnty.fun/downloads/books/TAEL/SELF%20IMPROVEMENT/MEDITATION/CONTEMPLATIVE%20MEDITATION/ZAZEN/INTERMEDIATE/Taking%20the%20Path%20of%20Zen%20-%20Robert%20Aitken%20%281982%29.pdf