Mary Ellen Sweeney Books

A Basic Book of Goldfish
A Basic Book of Goldfish

By Mary Sweeney

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Tropical Fish
Tropical Fish

By Mary E. Sweeney

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Malawi Cichlids
Malawi Cichlids

By Mary E. Sweeney

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Owning Discus
Owning Discus

By Mary E. Sweeney

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Tropical fishes
Tropical fishes

By Mary Ellen Sweeney

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Beyond Leprechauns
Beyond Leprechauns

By Mary Ellen Sweeney

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The Cichlid
The Cichlid

By Mary E. Sweeney

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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.

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