Janet Halfmann Books

Pelican s Catch Smithsonian Oceanic

By Janet Halfmann

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Red bat at Sleepy Hollow Lane

By Janet Halfmann

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Mother Red Bat and her new babies fly through the night in search of insects to eat until it is time to find a new home for the winter. Includes brief notes on the Eastern red bat.

Red bat at Sleepy Hollow Lane

By Janet Halfmann

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Mother Red Bat and her new babies fly through the night in search of insects to eat until it is time to find a new home for the winter. Includes brief notes on the Eastern red bat.

Red bat at Sleepy Hollow Lane

By Janet Halfmann

Average: 0.00, 0 Ratings

Mother Red Bat and her new babies fly through the night in search of insects to eat until it is time to find a new home for the winter. Includes brief notes on the Eastern red bat.

Red Bat at Sleep Hollow Lane

By Janet Halfmann

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Dolphin's rescue

By Janet Halfmann

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While leaping in the air, a Pacific white-sided dolphin lands aboard a research ship and must be returned to the sea.

Dolphin's rescue

By Janet Halfmann

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While leaping in the air, a Pacific white-sided dolphin lands aboard a research ship and must be returned to the sea.

Dolphin's rescue

By Janet Halfmann

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While leaping in the air, a Pacific white-sided dolphin lands aboard a research ship and must be returned to the sea.

Dolphin s Rescue

By Janet Halfmann

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Canada Goose at Cat Tail Lane

By Daniel Stegos, Janet Halfmann

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In early spring, Canada Goose patiently sits on a clutch of eggs for several weeks then, when five fluffly goslings finally hatch, she and her mate teach them all they need to know about swimming,...

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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.