Communication, Education, Psychology

The Colours of Your Mind, Jerry Rhodes and Sue Thame, Collins (1988). This book helps you to diagnose your thinking styles which are labelled green (creative), red (analytical) and blue (judgemental). Each main stlye has its 'hard' and 'soft' flavours. Although the techniques are now embodied in toolkits and courses from Smartskills, this is the orginal source and still worthy of study and practice.