Challenge friends and family in this daily interactive quiz . Shop On-line Canadian products, Canadian prices. Free Catalogue Send for a free catalogue filled with the very best from Reader's Digest Canada. In a word ladder puzzle you have to change one word into another by altering a single letter at each step. Each step on the word ladder must be a valid word.
Some Ladders only have a top and bottom clue.
This type of puzzle was invented in 1878 by Lewis Carroll, the author of Alice in Wonderland .