Original sentence: A book on this topic is Dark Tourism (Tourism, Leisure & Recreation).They claim that motivation is driven by media coverage and a desire to see for themselves, and that there is a symbiotic relationship between the attraction and the visitor, whether it be a death camp or site of a celebrity's death
Edited sentence: An excellent book on this misunderstood topic is Dark Tourism (Tourism, Leisure & Recreation).There is a symbiotic relationship between the attraction and the visitor, whether it be a death camp or site of a celebrity's death.They also determine that motivation is driven by media coverage and a desire to see for themselves