Alternatively, you can purchase a hard copy of the book from online retailers, such as Amazon or Google Books. Many libraries also carry a copy of the book, which you can borrow for free.
If you need a gentle introduction, try Farlow first. If you need rigorous theory with modern notation, try Strauss's Partial Differential Equations: An Introduction . But if you want a concise, no-nonsense bridge from ODEs to applied PDEs, Sneddon is your book. Alternatively, you can purchase a hard copy of
Have you used Sneddon’s book? Share your study tips or favorite derivation in the comments below. And remember: In PDEs, the boundary conditions define the solution—so define yours clearly before you start. Alternatively, you can purchase a hard copy of