In June 2019 EJR Language Service published two series of puzzle books, one devoted to cryptograms and the other to Sudoku. It is hoped that these books can offer people of all ages hours of fun and an opportunity to keep their brains active and sharp. Details are provided below.

Cryptogram books

Cryptograms: Proverbs and sayings
ISBN: 978-0-6485800-0-3
A collection of 100 cryptograms, based on proverbs and sayings that present popular wisdom in a condensed form. A brief introduction offers some useful strategies for solving the cryptogram puzzles. A hints section provides a single letter substitution for each puzzle. Answers are given at the end of the book.

New Testament cryptograms
ISBN: 978-0-6480782-8-9
A collection of 100 cryptograms, based on carefully selected verses from the Kings James version of the New Testament. A brief introduction offers some useful strategies for solving the cryptogram puzzles. A hints section provides a single letter substitution for each puzzle. Answers are given at the end of the book. Clear 16 pt font for puzzles.

Cryptograms from the pen of Shakespeare
ISBN: 978-0-6485800-1-0
A collection of 100 cryptograms, based on quotations from the immortal works of William Shakespeare. A brief introduction offers some useful strategies for solving the cryptogram puzzles. A hints section provides a single letter substitution for each puzzle. Answers are given at the end of the book.

Poetry cryptograms
ISBN: 978-0-6485800-2-7
A collection of 100 cryptograms, based on quotations from the works of English language poets from Donne to D.H. Lawrence. A brief introduction offers some useful strategies for solving the cryptogram puzzles. A hints section provides a single letter substitution for each puzzle. Answers are given at the end of the book. Size 14 font for puzzles.

Sudoku books

Sudoku skill builder
ISBN: 978-0-6480782-4-1
An attractively formatted Sudoku puzzle book containing 96 puzzles at three levels of difficulty, allowing the user to gradually build their skill. The introduction includes brief instructions on how to play. Solutions to all puzzles are included at the end of the book. This is the first in a series of four books.

Sudoku: 96 easy puzzles
ISBN: 978-0-6480782-5-8
EASY PUZZLES FOR BUSY PEOPLE! An attractively formatted Sudoku puzzle book containing 96 relatively easy puzzles. Includes brief instructions on how to play, and solutions to all puzzles. This is the second in a series of four Sudoku puzzle books.

Sudoku: 96 medium puzzles
ISBN: 978-0-6480782-6-5
An attractively formatted Sudoku puzzle book containing 96 puzzles of medium difficulty. The introduction includes brief instructions on how to play, and solutions to all puzzles are included at the end of the book. This is the third book in a series of four books.

Sudoku: 96 hard puzzles
ISBN: 978-0-6480782-7-2
An attractively formatted Sudoku puzzle book containing 96 diabolically difficult puzzles. The introduction includes brief instructions on how to play, and solutions to all puzzles are included at the end of the book. This is the final book in a series of four.