The most useful book on Zen I have read so far. Zen abhors analysis and description, and Suzuki takes a practical, human approach to the practice of zazen. The book was compiled from talks given by him at his Zen centres, and is full of honest advice and personal experience.
I am on my third reading, and am finally getting to appreciate some of the messages. These concepts are in fact very simple, if you read with your heart rather than your head. It is free from Zen-stifling intellectual analysis and explanation which is found in lesser works, there is no struggling with brain-busting koans, and satori is never mentioned.
One of the most important messages is very encouraging: that difficulty, distraction and hardship actually improve the practice of zazen. Great news for Beginners like me.