Onsumer behaviour aspects that contributed in the success of amazon Kindle

I have attached two briefs explaining the assignment .I have chosen to write about amazon Kindle .im required to talk about a successful product and link it to 3 consumer behaviour aspects out of 6 that we have studied during the semester and justify the choice using theories and models discussed in each aspect.It should be no more than 3000 words .I will provide the outline that i want but you can chose the consumer behaviour aspects that you think is more relevant to kindle success .