Bipolar disorder manifests itself in a variety of forms. It can coexist with other psychiatric conditions, and treatment efficacy can depend on the type of bipolar state. This book covers the full range of atypical, rapid cycling and transient forms of bipolar disorder, from atypical and agitated depression to schizoaffective mixed states. The most recent ICD category is covered, and the authors also look at the biology and genetics of bipolar disorder, along with issues relating to age (children and the elderly), comorbidity, choice of drug treatment and investigational strategies.