Beyond legality and malware, there is a community reason. The niche community of vintage school story enthusiasts is small but passionate. When readers pirate rare books, it removes any financial incentive for legitimate reprints. Publishers are less likely to invest in restoring a series if free illegal copies are widely available. By seeking out legal copies (even expensive used ones), you signal that there is demand, which may eventually lead to affordable reprints or official eBooks.
This is a long shot, but if you are a dedicated researcher or librarian, you can attempt to trace the copyright holder through the Society of Authors (UK) or the Publishers Association. If the rights have reverted to a descendant, they may grant permission for a personal digital copy. c aikman series bookpdf
Search for the author’s official website or Patreon. Many indie authors offer a "Complete Series PDF Bundle" for a flat fee ($9.99 - $19.99). This gives you the entire C. Aikman series in a single, curated, high-resolution PDF file. You also support future books. Beyond legality and malware, there is a community reason
Several factors drive the persistent search for these books in PDF format: Publishers are less likely to invest in restoring