The Library Campaign was originally a campaign to get donations to purchase LRH books and get them placed into libraries around the world. It was never particularly effective, mainly because librarians and people in general don't want books from groups perceived to be destructive cults. If the Church of Scientology had repaired it's image, changing it from a mafia-like cult to the beingness of an Auditor, interest in the program could have been different. Mark the failure of the library program to inept leadership and sabotage from the top.
Still the Library Campaign was not any big deal... until the advent of the "Basics," i.e. the re-re-release and mandatory sales of basic LRH books and lectures. David Miscavige forced all staff off post giving them daily sales quotas that had to be achieved before they could go home. Now the Library Campaign became THE way to get Scientologists to purchase multiple sets of the same books — the only way that David Miscavige's insanely high sales quotas could be met.
There was zero real interest on actually getting books into libraries. There was only interest in making sales quotas so one could go home and sleep. The books that were in fact sent to libraries were promptly thrown into the trash. Checks of libraries around the US found zero LRH books in stock despite millions of dollars in sales. Which bothered David Miscavige not one bit since no word was ever spoken considering it was a colossal failure according to the program's stated purpose. That is because the actual purpose was never to get books in libraries. It was only to gain the income from the sales and achieve an illusion of tremendous popularity (useful if your interest is in gaining donations and support).
The campaign was a monumental fraud.