Special Issue of Theory and Practice of Logic Programming -- User-Oriented Logic Programming and Reasoning Paradigms -- Since the emergence of logic reasoning paradigms, such as answer set programming, constraint logic programming, probabilistic logic programming, abductive logic programming, inductive logic programming, and argumentation, much theoretical work has been done, for example concerning different semantics and their properties. More recently, implementations and IDEs emerged which have proven useful in various problem-solving applications. However, user-friendliness is still an issue, both for users who are logic programming experts and non-expert users who simply apply logic paradigms in problem-solving applications; for example, experts benefit from features like debugging and heuristic tuning, non-experts from educational material, explanations, and intuitive visualisations - all of which are ongoing topics of research. The goal of this special issue is to discuss different aspects involved in making logic reasoning paradigms more user-friendly: 1. Describe cutting-edge developments (e.g., novel IDEs, debugging techniques, visualisations, or methods for heuristic tuning) of both practical and/or theoretical nature; 2. Provide well-thought assessments of the state of the art (e.g., in the form of well-organised surveys or personal perspectives); 3. Describe new research directions, offering clear motivations, new perspectives, and solid foundations for other researchers to build upon (e.g. best practice or logic programming education) SUBMISSION DEADLINES: * Optional Notes of Interest: June 30th 2017 (to facilitate planning) * Title and Abstract: July 28th, 2017 * Full Paper: September 29th, 2017 SUBMISSION INSTRUCTIONS: Please submit notes of interest and title/abstract to ellmauthaler@informatik.uni-leipzig.de Submissions of manuscripts must be made in the TPLP format: http://www.cambridge.org/core/services/aop-file-manager/file/57597b8c6b444096594ef4c7 and handled through the TPLP Submission site: https://mc.manuscriptcentral.com/tplp GUEST EDITOR: * Claudia Schulz, claudia.schulz@imperial.ac.uk, Imperial College London, UK * Stefan Ellmauthaler, ellmauthaler@informatik.uni-leipzig.de, Leipzig University, Germany