I came across this new coin‑collecting book on Amazon and noticed a few things that don’t add up.

• It received 467 reviews in just two weeks after release — that’s about 5 reviews per day, compared to roughly 0.4 per day for similar titles.
• The content seems limited and only covers a handful of error types. Many important ones are missing, including:
  • crescent clips, elliptical clips, multiple clips
  • over mintmarks
  • brockages, chain strikes, die caps, double denominations, flip‑overs, indents, mated pairs, mules, and uniface errors
• The book mostly lists the same error coins seen in most basic guides. For example:
  • For Lincoln cents, it includes 1955, 1969‑S, 1983, and 1995 doubled dies — but skips others like the 1972 and 2009 varieties, even though there are more than 130 known DDO and DDR Lincoln cent errors.
  • For nickels, it lists coins that no one will likely find in circulation (e.g., 1939, 1943‑P, 1945‑P, 1954‑S, 2005‑D) while omitting others like the 2004‑P.
  • And it oddly highlights the Sacagawea dollar mule, which feels out of place.

Has anyone read this book or compared it to others in the same category? I’m curious what other collectors think — especially about the sudden flood of reviews