Features 264 neuroplasticity-producing puzzles Created by legendary University teacher, writer, entrepreneur Kim Powers Portable 6x9 - Only 180 pages Affordable Large puzzles (2 per page) ~~ Large Print Guaranteed 1-Unique Solution Suitable for all levels, beginner - expert AEQUORINS LetterOku Benefits Strengthen your vocabulary/spelling Deepen Focus Enhance problem-solving skills LetterOku vs Sudoku Standard Sudoku = digits 1-9. LetterOku = Letter Sudoku (not Wordoku). No hidden words. Another way to exercise your brain with hours of fun. Great for word & Sudoku lovers. “AEQUORINS” Edition **All the puzzles in the Edition solve for the same word** Use the 9 letters within the quote marks in the “AEQUORINS” Edition. LetterOku | Sudoku puzzles are logic-problems that incorporate seeing patterns. No guessing. 264 puzzles using the same word = the best neuroplasticity benefits. "A protein secreted by certain jellyfish that interacts with seawater to produce bioluminescent light." Why LetterOku? Neuroplasticity Requires continued challenges and Newness. Each LetterOku Edition requires the solver to remember a new set of letters to solve for, which equates to challenging and newness. These puzzles are not only fun but solving them triggers neuroplasticity. Therefore, working LetterOku puzzles helps your brain. These puzzles give you hours of fun, brain exercises. Symptom-Free Vivacious Living Studies have shown that people who train their brains regularly can often stave off the symptoms of Alzheimer’s and other forms of dementia. Neuroplasticity helps stroke survivors (and other brain injuries) recover their cognitive power more quickly, making full recovery a probability rather than just a possibility.Autopsies were done on highly-productive seniors--after death, of course--and found that they had been living with full-bl