I've used Fiverr professionally and personally. By using Fiverr, you basically are accepting crap work. Most of the profiles are fake and there are groups of fiver sellers from other countries that work together by giving each other good ratings. When you complain, Fiverr does absolutely nothing to help you. It's a great scam to the unsuspecting. Then you accept crap for work and have to do it yourself anyway. Finally, DO NOT send any data to a seller that has any value like a book idea. That seller will take your ideas and you will not hear from that fake seller again. I'll NEVER use Fiverr again. I can't say enough bad things about that group of scammers.