Andreu Llamas Books

The nervous system

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Explains the structures and functions of the central nervous system (brain and spinal cord) and the peripheral nervous system including the autonomic systems.

Dolphins

By Andreu Llamas

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Provides detailed descriptions of the physical characteristics and behavior of dolphins.

Spiders

By Andreu Llamas

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Describes the physical characteristics, habitat, behavior, and ancestors of spiders.

Whales

By Andreu Llamas

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Provides detailed descriptions of the physical characteristics and behavior of whales.

Giraffes

By Andreu Llamas

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Describes the habitat, pruning habits, stomach processes, relatives, and ancestors of the tallest land animal in the world.

Octopuses

By Andreu Llamas

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Examines the habitat, intelligence, self-defense actions, and jet propulsion of this tentacled marine mollusk.

La jirafa : animales con cuatro estomagos

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La Metamorfosis

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El Arbol

By Andreu Llamas

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La Evolucion

By Andreu Llamas

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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.