This volume would not have been possible without the work of many. First, to mention, all the helpful support by Springer Publishers, in particular to highlight Fritz Schmuhl, open and supportive to the book idea from the very first proposed structure in August 2014 onwards as well as Devi Ignasy providing quick and precise instructions and responses on all the (more or less) little issues popping up during the implementation of the task. Additionally, two anonymous book reviewers provided several helpful proposals which are hereby especially acknowledged. However, the main part of the work was done by the contributors who managed to submit their drafts within the—often short—deadlines and to appropriately respond to (perhaps sometimes annoying) requests made by a (perhaps often too) keen editor. All those original contributions constitute the core part of this edited volume, and without any of them, it would not be (hopefully) as helpful and insightful as it is. The editor would also like to express his gratefulness to those contributors for their dedication as well as efforts who originally committed to submit a chapter but were not able to provide a first draft or—in particular—who were not able to finish a final draft due to time restrictions or other reasons.