Advantages of using books:
- There is already a form of quality check done on the through the editing process. But this doesn't mean that mistakes can't be made... check all the information you find against other sources for inconsistencies and bias.
- Provides and overview of the topic and helps you put the issue into context.
Disadvantages of using books:
- There is a time delay in publishing information; so very new groups, or movements, may not have much written about them.