1. Challenges of Fingerprinting in Indoor Positioning and Navigation 2. Wi-Fi Tracking Threatens Users' Privacy in Fingerprinting Techniques 3. Lessons Learned in Generating Ground Truth for Indoor Positioning Systems Based on Wi-Fi Fingerprinting 4. Radio Maps for Fingerprinting in Indoor Positioning 5. Crowdsourced Indoor Mapping 6. Study and Evaluation of Selected RSSI-Based Positioning Algorithms 7. Low-Complexity Offline and Online Strategies for Wi-Fi Fingerprinting Indoor Positioning Systems 8. Radio Fingerprinting-Based Indoor Localization: Overcoming Practical Challenges 9. Mapping Indoor Environments: Challenges Related to the Cartographic Representation and Routes 10. OGC IndoorGML: A Standard Approach for Indoor Maps 11. The EvAAL Evaluation Framework and the IPIN Competitions 12. IndoorLoc Platform: A Web Tool to Support the Comparison of Indoor Positioning Systems 13. Challenges and Solutions in Received Signal Strength-Based Seamless Positioning 14. Deployment of a Passive Localization System for Occupancy Services in a Lecture Building 15. Remote Monitoring for Safety of Workers in Industrial Plants: Learned Lessons Beyond Technical Issues 16. A Review of Indoor Localization Methods Based on Inertial Sensors 17. Fundamentals of Airborne Acoustic Positioning Systems 18. Indoor Positioning System Based on PSD Sensor