William Atkinson has 2 audiobooks on Listento.it, narrated by 2 narrators. The most-rated is Fourteen Lessons in Yogi Philosophy and Oriental Occultism.

We greet our old students who have returned to us for the advanced course. We feel that, hereafter, it will not be necessary to repeat the elementary explanations which formed such an important part of the former class work, and we may be able to go right to the heart of the subject, feeling assured that each student is prepared to receive the same. Many learned the former lessons from curiosity - some have become so interested that they wish to go on - others have failed to find the sensational features for which they had hoped, and have dropped from the ranks. It is ever so. Many come, but only a certain percentage are ready to go on. Out of 1,000 seeds sown by the farmer, only 100 manifest life. But the work is intended for that 100, and they will repay the farmer for his labor. In our seed sowing, it is even more satisfactory, for even the remaining 900 will show life at some time in the future. No occult teaching is ever wasted - all bears fruit in its own good time. We welcome the students in the advanced course - we congratulate ourselves in having such a large number of interested listeners - and we congratulate the students in having reached the stage in which they feel such an interest in the work, and in being ready to go on.
©2017 Majestic (P)2018 Majestic

We see, as they perhaps do not, that to many of them, this series of lessons will be as seed planted in fertile soil - which will in due time put forth sprouts, which will force their way gradually into the sunlight of consciousness where they will put forth leaves, blossom and fruit. Many of the fragments of truth which will be presented to you will not be recognized by you at this time; but in years to come, you will recognize the verity of the impressions which will be conveyed to you in these lessons. And then, and then only, will you make these truths your own. We intend to speak to you just as if you were gathered before us in person and as if we were standing before you in the flesh. We feel sure that the bond of sympathy between us will soon grow so strong and real that as you listen to our words, you will feel our presence almost as strongly as if we were with you in person.
©2017 Majestic (P)2017 Majestic