Period mappings and differential equations. From $\bf C$ to $\bf C_p$
  This is an introduction to $p$-adic geometry and $p$-adic analysis focusing on the theme of $p$-adic period mappings. We follow as closely as possible the development of the classical theory of complex period mappings, blending differential equations, group theory and geometry. The text ends with a detailed discussion of $p$-adic triangle groups. 
Yves Andr\'e (Paris)