Making Wooden Jigsaw Puzzles 128 pages | English | ISBN-10: 0811725553 | ISBN-13: 9780811725552 https://www.amazon.com/dp/0811725553

The Little Giant Encyclopedia of Puzzles 512 pages | English | ISBN-10: 0806942584 | ISBN-13:...

Big League Baseball Puzzlers 128 pages | English | ISBN-10: 0806973374 | ISBN-13: 9780806973371 https://www.amazon.com/dp/0806973374

200 Perplexing Chess Puzzles 143 pages | English | ISBN-10: 0806997273 | ISBN-13: 9780806997278 https://www.amazon.com/dp/0806997273

Challenging Math Puzzles 96 pages | English | ISBN-10: 0806981156 | ISBN-13: 9780806981154 https://www.amazon.com/dp/0806981156

Brain Puzzler's Delight 96 pages | English | ISBN-10: 0806988169 | ISBN-13: 9780806988160 https://www.amazon.com/dp/0806988169

Mind-Sharpening Lateral Thinking Puzzles 96 pages | English | ISBN-10: 0806994320 | ISBN-13: 9780806994321 https://www.amazon.com/dp/0806994320

Challenging Science Puzzles 96 pages | English | ISBN-10: 0806996102 | ISBN-13: 9780806996103 https://www.amazon.com/dp/0806996102

Visual Thinking Puzzles 96 pages | English | ISBN-10: 0806999756 | ISBN-13: 9780806999753 https://www.amazon.com/dp/0806999756

The world's most challenging puzzles 128 pages | English | ISBN-10: 0806967307 | ISBN-13: 9780806967301...

Great Book of Math Puzzles 96 pages | English | ISBN-10: 0806988142 | ISBN-13: 9780806988146...

Puzzles For The High IQ 96 pages | English | ISBN-10: 0806943815 | ISBN-13: 9780806943817...

Critical Thinking Puzzles 96 pages | English | ISBN-10: 0806994304 | ISBN-13: 9780806994307 https://www.amazon.com/dp/0806994304

Mindstretching Puzzles 96 pages | English | ISBN-10: 0806906944 | ISBN-13: 9780806906942 https://www.amazon.com/dp/0806906944

Challenging False Logic Puzzles 96 pages | English | ISBN-10: 0806997206 | ISBN-13: 9780806997209 https://www.amazon.com/dp/0806997206

Fiendishly Difficult Visual Perception Puzzles 64 pages | English | ISBN-10: 0806982683 | ISBN-13: 9780806982687...

Fiendishly Difficult Math Puzzles 64 pages | English | ISBN-10: 0806982705 | ISBN-13: 9780806982700 https://www.amazon.com/dp/0806982705

Lateral Logic Puzzles 96 pages | English | ISBN-10: 0806906189 | ISBN-13: 9780806906188 https://www.amazon.com/dp/0806906189

Fantastic Book of Logic Puzzles 128 pages | English | ISBN-10: 0806947543 | ISBN-13: 9780806947549...

Sorting Africa's Developmental Puzzle: The Participatory Social Learning Theory as an Alternative Approach 284 pages...