This wonderful resource book by Jenny Dean is precisely the guide needed for those starting out with Natural Plant Dyes.  This 2nd revised edition handbook describes in full detail how to prepare and use natural dyes on a variety of fibres to produce a wide range of colours, following safe and environmentally-friendly methods.  It contains a comprehsnive range of suggested recipes prodicing over 100 colours.  
 
A really great handbook for dyers beginning their journey!