While the full PDF is protected by copyright, several reputable educational platforms host digitized versions, previews, and course materials:
by J. Hannah and M.J. Hillier is a cornerstone textbook for engineering students. Since its first publication in 1962, it has evolved into a definitive guide for BTEC NC/D, HNC/D, and first-year undergraduate courses across mechanical, civil, and aeronautical engineering. Core Themes of the Hannah and Hillier Text
While a free PDF might seem like a shortcut, it often leads to a fractured learning experience. If you need a digital copy for accessibility reasons (screen reading, large print, portability), spend the $20–$30 on a legal Pearson e-text or hunt for a used 2nd-hand copy.