Beuiouer Three-Way 450W Professional Speaker High Power Splitter 750Hz/5000Hz Stage Home Theater 3-Unit Audio Crossover Filter, 500448536

Strait Music Company Gift Certificate ($50)

Logic Grid Puzzle Book for Smart Adults: Over 100 Fun and Challenging Logic Puzzles for Adults

Jigsaw Sudoku Adult Puzzle Book: 500 Easy to Hard : Keep Your Brain Young (Logical Brain Games Series)

Traditional Logic I

Sudoku Large Print With Tips and Tricks: 150 Medium to Hard Puzzles for Adults & Seniors for Gradually Improving Sudoku Skills, One Per Page (Sudoku Sensei Series)

From Frege to Godel: A Source Book in Mathematical Logic, 1879-1931 (Source Books in History of Sciences)

The Lady or the Tiger?: and Other Logic Puzzles (Dover Recreational Math)

A Profile of Mathematical Logic (Dover Books on Mathematics)