Easy Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 29: Two Easy (DiffLev 3-4) Goldsmithery Puzzles (numbers 137-138) 
 
-  Step-by-step instructions for solving  Puzzle 137, (54/144)   Diff: 3/992
 -  Step-by-step instructions for solving  Puzzle 138, (72/144)   Diff: 4/9993