I'd always believed this to be quotation of Lord Byron until I researched it for a book and found it attributed to Robert Louis Stevenson and he added "is a better thing than to arrive and the true success is to labour." at the end.
It's a good description of the third book about the First Family of the Blood, especially the addendum.
Like the second book, it picks up from the end of the last story and continues, this time with Jack and Rachael, before changing direction to follow another character into another development of the Family. All three of these books have been written the same way, becoming voyages of discovery rather than journeying from one known point to another.
I'm finding it a fascinating way of writing, all the more so because I'm working on another story at the same time which has been plotted and outlined to death and written as episodes out of sequence for eventual joining together. (I believe most movies are shot this way and only joined up at the end.) I'm having fun with both stories and enjoying the comparison of writing methods without thinking either is necessarily the best. A case for "horses for courses' it seems.
Happy Australia Day to all