"One Wintry Night"
Ruth Bell Graham
I had this book as a child, and while it is heavily Christian (it tells the Christian Christmas story, starting with Adam & Eve) the illustrations were stunning. Absolutely fabulous. I used to sit for hours staring at the pictures, soaking in every minute detail (each illustration has a pill bug hidden in it!). I actually wrote the author (Billy Grahams wife) a letter asking about the illustrations, and she told me they took her years to complete and were done in egg tempera.
You can see a few of the full page illustrations in this blog post, but they aren't large enough to get the full beauty.
"The Little Prince" deluxe pop up edition
Antoine de Saint-Exupery
I love The Little Prince, I think it's adorable and sweet. I'm pretty sure I squeaked out loud when I saw the pop up edition - I have a soft spot for pop up books, and this one was particularly well done. The book was a great, hefty hardcover and the illustrations were crisp and colored.
"Lady Cottington's Pressed Fairy Book"
This is a morbid and hilarious book that I want to have on my coffee table. The premise of the book is that a little girl would go out in her garden with a blank journal and wait until a fairy flew by... then she would slam the covers closed and press the fairy, just like one would press flowers. At some point the fairies realize what's going on and start having competitions to make the silliest faces and poses. The illustrations, again, are beautiful and silly.
This is, technically, not a children's book (due to nudity and the odd story itself) but many people don't realize it.