Excerpt on Principia Mathematica and book pricing, no substantive lead

Excerpt on Principia Mathematica and book pricing, no substantive lead The passage discusses historical mathematics texts and their market value, offering no connections to influential actors, financial flows, or misconduct. It contains no actionable investigative information. Key insights: Describes Whitehead and Russell's Principia Mathematica project; Mentions a 3‑volume set priced at £480 and auction record of £800; Notes limited print run of 750 copies by Cambridge University Press