Yes, you can access a significant portion of the archive for free. The A.R.E. offers a "search the readings" portal that allows you to view summaries and snippets. You can usually see the full text of any reading over 75 years old (which is nearly all of them) for free, though you may need a free account to download PDFs.
Start at edgarcayce.org/readings (free search). For offline study, the 12-volume Complete Readings CD-ROM is available through A.R.E. edgar cayce readings archive
In 1923, the readings shifted to include metaphysical topics. Cayce introduced the concept of reincarnation, explaining how past-life experiences influence a person's current psychology, relationships, and phobias. Yes, you can access a significant portion of