Easy Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 53: Two Easy (DiffLev 3-4) Unperishably Puzzles (numbers 185-186) 
 
-  Step-by-step instructions for solving  Puzzle 185, (56/144)   Diff: 3/992
 -  Step-by-step instructions for solving  Puzzle 186, (66/144)   Diff: 4/9991