Peter Lindner worked as a soft-matter scientist at Institut Laue-Langevin (ILL), Grenoble, France for 35 years. He is an expert in small-angle neutron scattering (SANS) and has been responsible for the SANS instrument D11 for 25 years. He oversaw the coordination of its user operation and was project leader of instrument upgrades and sample environment development, in particular of SANS experiments under non-equilibrium conditions and online rheology. Among others, his research interests lie in the structure and dynamics of complex fluids, like polymer solutions, colloidal dispersions and lyotropic lamellar phases, which are exposed to external fields, such as shear. In 1990 he founded, together with Thomas Zemb, the Bombannes Summer School on scattering methods applied to soft condensed matter. Together, they published in 1991 the lecture notes of the first Bombannes school (Elsevier North Holland Delta Series, 1991) and edited the first edition of this book with Elsevier in 2002.