Here are two of my favorite recommended Studies.

Joel Goldstein 

The Infinite Way is a spiritual teaching of universal principles introduced to the world by the internationally recognized mystic and spiritual teacher, Joel S. Goldsmith.

 

Mary Baker Eddy

Mary Baker Eddy was an influential American author, teacher, and religious leader, noted for her groundbreaking ideas about spirituality and health, which she named Christian Science. She articulated those ideas in her major work, Science and Health with Key to the Scriptures, first published in 1875.