I believe there are 124 books in the 3+ category and thus far I have managed to track down and read 95 of them. A lot of the remaining are either not available in English, for instance Uppo Nalle and We Are the Triplets. Some of the books are available but are prohibitively expensive, for instance Fire-Engine Lil which was over $50 last I looked as it has been out of print for quite awhile.
I am still periodically checking for the remainders of this list, but, I won't feel too upset if I don't get to them all. Managing 77% of this list still feels like quite an accomplishment. I was already familiar with some of these titles from my own childhood, but, I will say that my favorite from this list was My Naughty Little Sister. It was just so surprisingly good. The chapters are just the right length for a bedtime story and they are just wonderfully funny without being too bratty. My daughter just loved that book. I need to buy it at some point, I have the ebook because it was cheaper and I thought the book wouldn't be very good. Now I wish I would have purchased a nice hardcover of it. Quite a few of these were available to read on Open Library.
Again, I highly recommend buying the book if you plan to do this list. They are not that expensive used and then you can also read the discussion for why a book was included. The list really is not much good without the discussion.