This is so cute! A smaller version of the 6x6 Arch Tunnel Book, with 4 pages (a soiid back cover and 3 pages with arch window cut-outs). This size is perfect for a chunky book, too.
Also shown in the extra photos above with 3 collage sheets made specifically for this book: with care to ensure the image seen through the smallest archway will be interesting. The collage sheets are linked below.GND 190804-TnlBkKt 190804RT 190804new 190818SK 190829NB 190829DC 200917SC