Frank Longo Books

Revenge of the Ninja Sudoku
Revenge of the Ninja Sudoku

By Frank Longo

Average: 0.00, 0 Ratings

Read More
Ultimate Ninja Sudoku
Ultimate Ninja Sudoku

By Frank Longo

Average: 0.00, 0 Ratings

Read More
Breezy Monday Sudoku
Breezy Monday Sudoku

By Frank Longo

Average: 0.00, 0 Ratings

Read More
Easy Tuesday Sudoku
Easy Tuesday Sudoku

By Frank Longo

Average: 0.00, 0 Ratings

Read More
Movie doku
Movie doku

By Frank Longo

Average: 0.00, 0 Ratings

Read More
Sports doku
Sports doku

By Frank Longo

Average: 0.00, 0 Ratings

Read More
Sudokugrams Mensa
Sudokugrams Mensa

By Frank Longo, Alan Stillson

Average: 0.00, 0 Ratings

Read More

Related Articles from our Blog

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

Read More