P.S.: Also both of these books are very short.
They can be read in a couple of hours.
Actually the audio version of «As a man thinketh» I like the most is the one I found on The Resilient Mind Podcast's feed and it's 55 minutes long — https://theresilientmind.podbean.com/e/as-a-man-thinketh-by-james-allen/
However the catch is that reading «Tao Te Ching» in one sitting is not the best for retention, it's better to make a lot of pauses to absorb the verses while reading it for the first time).