I think that no matter what you try to do with
Brightvale, A Complete History, it will disappear on you -- whether you get it from advent, or not; whether you buy it from someone else's shop, or from the auctions. Even if you read it to your reading pet, eventually it will disappear from your pet's reading list. It is searchable on the Shop Wiz, keep refreshing even if it doesn't show up sometimes. The Auction Genie will also show it to you a couple of times, and then he'll say: Sorry, couldn't find anything matching that description! But, if you bid on any, you will be able to see your bids when you click on My Bids.
If you try to send it to somebody, it will either show up as a little box with a red X in it, or it won't show up at all!
Once it's in your Items box, and you refresh and it's not there, DO NOT REFRESH AGAIN. Instead, hit your backspace key to go back to that previous page before it disappeared...then carefully decide what you want to do with book. Some people are saying it can't be traded.
So be careful how you handle this book and take care as to where you want to move it to! But, I think that no matter what you do, at some point the book will disappear -- and perhaps not show up again at all!