Easy Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 38: Two Easy (DiffLev 4) Outsparkling Puzzles (numbers 155-156) 
 
-  Step-by-step instructions for solving  Puzzle 155, (62/144)   Diff: 4/9953
 -  Step-by-step instructions for solving  Puzzle 156, (74/144)   Diff: 4/9999