Everything is Practice is based on Gil Fronsdal's extensive experience in both practicing on silent meditation retreats and guiding others in retreat practice. This book is an invaluable guide to understanding what to expect while on retreat and how to include everything that happens there in the field of mindfulness.
Gil Fronsdal is the guiding teacher of the Insight Meditation Center (IMC) of Redwood City. He has a PhD in Buddhist Studies from Stanford University. His many dharma talks available online contain basic information on meditation and Buddhism, as well as subtle concepts of Buddhism explained at the level of the lay person.
I definitely wish I’d read this before I went on my first silent retreat - it would’ve better helped me understand the unwritten “culture” (amongst other things).