As a registered UK publisher with a full 100-ISBN block purchased directly from Nielsen, I am shocked at how unprotected these ISBNs are.Here is the reality:Despite paying for unique ISBNs, many were already in use by other people’s books long before I purchased the block. Some titles were published years earlier by self-publishers who had no legal right to use them.Nielsen Title Editor does not prevent this. Instead, it forces me into a slow “claim” process, one ISBN at a time, with endless screenshots, proofs, and back-and-forth emails. Out of 100 ISBNs, I have only managed to reclaim a handful — and only after wasting weeks.Even after updating a record, Nielsen still leaves wrong titles visible in feeds (e.g., Amazon and IngramSpark), meaning customers end up receiving unrelated books.The entire point of paying for ISBNs is to guarantee uniqueness and protect ownership. Yet Nielsen allows external distributor feeds (Ingram, Lulu, Biblio, Amazon) to overwrite ISBNs, making their system meaningless.The support process is equally disappointing. Responses take days, issues drag on for weeks, and there is no way to bulk-reclaim or secure your entire block. Every book has to be fought for individually.This is not just a nuisance it directly damages my business. Customers get wrong books, authors lose trust, and publishers are left unable to use the ISBNs they legally purchased.The ISBN system is supposed to be a safeguard. Right now, under Nielsen, it is a broken, insecure database that leaves legitimate publishers at risk.
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