You included that Mickey Mouse Tunnel in London but not the Seikan Tunnel connecting the islands of Honshu and Hokkeido? - The building of Seikan was one of the greatest engineering feats of all time.
When riding that tunnel by train you go 140 meters below the sea floor of the Pacific through solid granite.
Unitl the new Gotthard tunnel is finished Seikan will remain the longest tunnel in the world with a length of 54 km. The Channel tunnel just doesn't compare with a length of 50 km and a depth of just 75 meters and it was built through soft rock.
I have other issues with the listings in your book but I feel strongest about your non-inclusion of the