The book is targeted to a readership from the Earth sciences, from the level of MSc students and upwards. Each method presented will have some suggestions for further reading, referring to textbooks and scientific literature. The book will be a useful resource for lectures and numerical practicals on rheology, microscopy, petrology, structural geology, etc. It should be the "starting package" for students and researchers of the earth science community interested in numerical modelling of microstructures and anyone intending to work with ELLE.