The KiCAD suite is a group of open-source, cross-platform programs for drawing schematics and PCBs.
Some complementary WikiBooks are:
- Practical Electronics/PCB Layout has a more generic discussion of PCB layout
- Practical Electronics/PCB Manufacture
- Robotics/Design Basics/Design software briefly mentions Kicad and other software and hardware tools used to build robots
- Electronics Workshop Manual
- Circuit Idea discusses circuits in general