A coloring book by Abi Daker on the theme of worlds that stretch upward. City buildings, an amusement park, a greenhouse, an airfield and other places are drawn in fine detail.
There are 27 illustrations in total, including some drawn like cross-sections and some like floor plans. The book is an A4 variant size with 64 pages.
This is the Japanese edition, published by Graphic-sha, of the book originally titled Vertical Worlds.