I added my Amazon wishlist books to my TSG TBR.
Now I'm looking at Calibre, which is all of my owned ebooks. I added my first tier TBR to TSG. I also have a second tier TBR which are books that have come my way as freebies primarily, not out of any real interest. I don't think I'll add those. Then there are the hundreds of public domain classics. Decisions must be made....