Special sauce recommendations!

1. Insects: A Guide to Familiar American Insects by Herbert S. Zim
2. Seashores; a Guide to Animals and Plants Along the Beaches by Herbert S. Zim
3. Stars: A Guide to the Constellations, Sun, Moon, Planets and Other Features of the Heavens by Herbert S. Zim
4. Flowers - a Guide to Familiar American Wildflowers by Herbert S. Zim
5. Mammals;: Guide to Familiar American Species; 218 Animals in Full Color by Herbert S. Zim
6. Fishes; a Guide to Fresh and Salt-water Species by Herbert S. Zim
7. Trees: A Guide to Familiar American Trees by Herbert S. Zim
8. Fossils: A Guide to Prehistoric Life by Frank H. T. Rhodes
9. Reptiles and Amphibians by Herbert S. Zim
10. Weather: Air Masses, Clouds, Rainfall, Storms, Weather Maps, Climate, by Paul E. Lehr
11. Birds of North America by Herbert S. Zim
12. Pond Life by George K. Reid
13. Seashells of the World by R. Tucker Abbott
14. Geology by Frank Harold Trevor Rhodes
15. Butterflies and Moths by Robert T. Mitchell
16. North American Indian Arts (Golden Guide) by Andrew Hunter Whiteford
17. Landforms by George F. Adams
18. Spiders and Their Kin (Golden Guide) by Herbert W. Levi
19. The Pacific Northwest;: A Guide to the Evergreen Playground, (A Golden Regional Guide) by Herbert S. Zim
20. Insect Pests by George S. Fichter

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1. National Audubon Society Field Guide to North American Rocks and Minerals (Audubon Society Field Guide) by Charles Wesley Chesterman
2. A Field Guide to Rocks and Minerals by Frederick H. Pough
3. Rocks & Minerals by Sue Fuller
4. Simon & Schuster's Guide to Rocks and Minerals (Rocks, Minerals and Gemstones) by Simon & Schuster
5. Rocks and Minerals (Eyewitness Handbooks) by Chris Pellant
6. Rocks & Minerals: Rocks & Minerals (Audubon Guides) by Edward Ricciuti
7. Rocks and Minerals (Field Guide and Introduction to the Geology and Chemistry of) by Charles A. Sorrell
8. Crystal & Gem by R. F. Symes
9. DK Handbooks: Gemstones by Cally Hall
10. Manual of Mineralogy: After James D. Dana by Cornelis Klein
11. Geology by Frank Harold Trevor Rhodes
12. Handbook of Rocks, Minerals, and Gemstones (Rocks, Minerals and Gemstones) by Walter Schumann
13. The Map That Changed the World by Simon Winchester
14. Annals of the Former World by John McPhee
15. Let's Go Rock Collecting by Roma Gans

People with this book also have... (more obscure)

1. Fishes; a guide to fresh and salt-water species by Herbert S. Zim (expected 1.3, found 35)
2. Seashores; a guide to animals and plants along the beaches by Herbert S. Zim (expected 1.6, found 43)
3. Insect Pests by George S. Fichter (expected 0.8, found 20)
4. Mammals;: Guide to familiar American species; 218 animals in full color by Herbert S. Zim (expected 1.6, found 34)
5. Flowers - a Guide to Familiar American Wildflowers by Herbert S. Zim (expected 2.2, found 44)
6. Geology by Frank Harold Trevor Rhodes (expected 1.1, found 20)
7. Fossils: A Guide to Prehistoric Life by Frank H. T. Rhodes (expected 2.3, found 42)
8. Reptiles and Amphibians by Herbert S. Zim (expected 2.2, found 38)
9. Seashells of the World by R. Tucker Abbott (expected 2.2, found 35)
10. Weather: Air Masses, Clouds, Rainfall, Storms, Weather Maps, Climate, by Paul E. Lehr (expected 2.4, found 37)
11. Pond Life by George K. Reid (expected 2, found 29)
12. Spiders and Their Kin (Golden Guide) by Herbert W. Levi (expected 2, found 28)
13. Butterflies and Moths by Robert T. Mitchell (expected 2, found 28)
14. Stars: A Guide to the Constellations, Sun, Moon, Planets and Other Features of the Heavens by Herbert S. Zim (expected 3.9, found 49)
15. A Field Guide to the Mammals: North America North of Mexico by William Henry Burt (expected 2.2, found 20)