Found another one! Nightmare in Pink has 287 pages per GR. Worldcat states 291. The actual book's story ends on page 266, followed by ads (3 pages), blank page, announcement page ("turn the page and read the first chapters of..."), blank page, and, finally, Chapter One of the next book - ending on page 291.
It seems to me the page count should either be 291 (Worldcat) or 266 - actual book's story.
Thanks, lethe and Dziara, I will correct the page count to 266. I know that we use Worldcat as the main source for page count but that the actual book can overrule Worldcat, but this difference confused me. I appreciate the clarification.
It seems to me the page count should either be 291 (Worldcat) or 266 - actual book's story.