By the 1920s, dogsleds had for quite some time been the essential methods
of movement for mail, payload and individuals in the immense wild
of Gold country. Late advances in flying machine innovation
anyway were rapidly making air travel a favored
transportation mode in remote The Frozen North and dogsledding
would before long become out of date.
– "Iditarod,"
The Frozen North Open Terrains Data Focuses
It was his fear of insecurity
The bolded word here is the BESTSELLER. This kind of complement is a direct object complement. The adjective overnight denotes to the object bestseller which is an adjective. Another adjective complements another adjective, thus, the term direct object.
