Elements Of Partial Differential Equations By Ian Sneddon.pdf -

First, I should consider the content. The book is likely an introductory text, given the title "Elements," so it probably covers basics before moving to more advanced topics. Common topics in a PDE textbook include classification of PDEs (elliptic, parabolic, hyperbolic), methods of solution like separation of variables, Fourier series, and methods for solving first-order PDEs. Maybe it includes special functions or Laplace transforms?