The Way of Zen is a comprehensive introduction to Zen Buddhism, including the history and practices. Alan Watts explains how the ancient Chinese philosophy of Taoism combined with Indian Buddhism to form Zen. He also shares many practices of Zen such as meditation, koans, and arts.
The Seven Spiritual Laws of Success is about reaching our dreams with ease, through following wisdom from both ancient religions and modern spiritual teachers. Deepak Chopra says we can attain much more than just material success, if we follow practices like silence, non-judgment, giving, intention and detachment.
The Power of Now is about living in the present moment so you suffer less and have more inner peace. It's really about reconnecting to your physical senses rather than being lost in thinking. Eckhart Tolle says past and future are only mental simulations because your life always happens Now.