A recurring complaint with Lulu seems to be books that don't arrive. And Lulu's position is that unless you choose a courier-type method of delivery with tracking, they will not refund the cost of the missing books. A user on the Lulu forums suggests that so long as you pay via Paypal you can dispute the charge and have it reversed. The reasoning here seems sound based on Paypal's website. After all the attachment of tracking information is possible with the mailing services Lulu uses, it seems they just choose not to do so. Just remember that you must open a dispute after 7 days but before 45 days (from the time of purchase). After 45 days Paypal still encourages reporting but will not open a dispute.
And while we are on the subject of Lulu, a recent Lulu blog states "Several of our forum mainstays like Keith Dixon and veinglory have chimed in with suggestions for Mark." I stated in a reply to this post that I am not a mainstay of the forum, in fact while I still read the forums I have not posted there in months and plan to never to post there again. The powers that be helpfully deleted this comment after a few days and left the incorrect statement on the post intact. The reason for my participation boycott being, should anyone care, that Lulu CEO Bob Young saw fit to launch an attack on the forums against myself and several other previously loyal Lulu-ers based on our criticisms of several recent changes at Lulu including removal of the ability to search exclusively for the Lulu-published (self-published) books lost amidst a plethora of third-part material (with a buggy search system). Right now I have no idea what is going on with the Lulu site where third-party material seems have quietly vanished away again?