Because the series is a staple of the genre, major retailers like Amazon, Barnes & Noble, and Kobo frequently put the early books on sale for as little as $1.99–$2.99. The Reading Order
Using "intitle:index of" to find EPUBs may seem like a quick shortcut, but it comes with several downsides:
Platforms like Kindle Unlimited or Scribd (Everand) occasionally feature the series or Gabaldon's novellas.
Pirated EPUBs often have broken CSS, missing chapters, or "scannos" (optical character recognition errors) that ruin the reading experience.