- AudiolibroAbout the Holy BibleRobert G. Ingersoll
- AudiolibroLectures of Col. R.G. Ingersoll, Volume 2Robert G. Ingersoll
- AudiolibroMistakes of MosesRobert G. Ingersoll
- AudiolibroSelected Interviews with Robert G. Ingersoll, Volume 2Robert G. Ingersoll
- AudiolibroThe Works Of Robert G. Ingersoll, Volume 4Robert G. Ingersoll
- AudiolibroSelected Interviews with Robert G. Ingersoll, Volume 1Robert G. Ingersoll
- AudiolibroLectures of Col. R.G. Ingersoll, Volume 1Robert G. Ingersoll