A potential reading challenge idea?

I keep thinking about this idea I've had! What is the longest chain of books (WITHOUT repeating an author) you could make where each time, the next book was written by an author that had an endorsement quote on the cover of the previous one? E.g. Prince of Thorns (Mark Lawrence) has a quote on the front by Robin Hobb, so the next read is Assassin's Apprentice, which has a quote on the front by Melanie Rawn, so the next read is Dragon Prince, which has a quote on by Anne McCaffrey, so we choose Dragonflight