Every page in the library carries one difficulty value. Pick a level to see its titles.
The 547 records in search-index.json each hold a difficulty value; the values present in the file are Simple, Medium and Detailed. The three lists below show every page at each level.
Simple — 182 pages. Large, open shapes with few small details.
Medium — 183 pages. A middle ground — a few details inside big, colorable areas.
Detailed — 182 pages. More linework and smaller sections to color.