Easy Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 25: Two Easy (DiffLev 3-4) Exhaustingly Puzzles (numbers 129-130) 
 
-  Step-by-step instructions for solving  Puzzle 129, (53/144)   Diff: 3/991
 -  Step-by-step instructions for solving  Puzzle 130, (57/144)   Diff: 4/9932