case study questions ............................218
8.11 references .....................................219
image references..................................220
further reading......................................220
9. Affiliate Marketing...............................223
9.1 introduction.....................................224
9.2 key terms and concepts..................224
9.3 history..............................................225
9.4 how it works....................................226
mini case study: PriceGrabber .............228
9.5 tools of the trade.............................237
9.6 setting up a campaign.....................240
9.7 pros and cons..................................241
9.8 summary .........................................242
9.9 the bigger picture............................242
9.10 case study: TripAdvisor .................243
9.11 references .....................................245
further reading......................................246