I am a marathon listener of the Jean Auel series, Earth's Children. I inhaled the first 4 unabridged books, which totaled approx. 79 hours (not consecutively, obviously) and while the books are distractedly over-explicit with sexual encounters, I loved the narration by Sandra Burr. Unfortunately, the fourth book, Shelters of Stone, Burr ruined the experience by introducing a unrealistic voice change hurtful to the ear, by suddenly possessing Ayla with a Russian accent and Jondular--well, I'm not sure what happened to his voice. As others have commented, Burr is such a talented narrator yet this book was a painful listen. Read it, don't listen to it. Determined to get through this series, I am dreading finishing this fourth book and hope Burr cleanses her voiced version of characters for the last of the series. What a shame--sorry Ayla, you are a voice-over victim in this book.