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Just got around to listening to the CDs. The first 4 CDs are great. The 5th CD is damaged. The disk freezes ,repeats and has some really strange echoing type sounds. I haven't made it past the beginning of this CD so I can't comment on it as a whole. I have no idea what the 6th, 7th, or 8th CD sounds like! I have a very large non-fiction library of bound books covering subjects from algebra to zoology. I thought audio books would be an excellent addition to the library. At least with bound books I don't have 30 days in which to catch mechanical errors. I can correct printed errors whenever I come across them in bound books without the burden of returning them, except for missing pages.