Carlos E. Calvo Books

Margret & H.A. Rey's Curious George and the firefighters

By Margret Rey, H. A. Rey, Anna Grossnickle Hines, Carlos E. Calvo

Average: 0.00, 0 Ratings

While on a field trip to a fire station with Mrs. Gray's class, Curious George goes off on his own and is soon at the scene of a fire, where he finds a way to be helpful.

Play Ball Juega al softbol Martha Speaks Martha habla English and Spanish Edition

Average: 0.00, 0 Ratings

Margret H.A. Rey s Curious George and the firefighters

By H. A. Rey, Anna Grossnickle Hines, Margret Rey, Carlos E. Calvo

Average: 0.00, 0 Ratings

While on a field trip to a fire station with Mrs. Gray's class, Curious George goes off on his own and is soon at the scene of a fire, where he finds a way to be helpful.

La mala suerte me sigue

By Ana Siqueira Author Carlos Velez Aguilera Illustrator Carlos E. Calvo Tran Slator

Average: 0.00, 0 Ratings

En este divertido libro ilustrado sobre las supersticiones, ¿podrá Miguel aprender a crear su propia suerte y librarse de la mala suerte antes de que sea demasiado tarde?In this fun p...

Mario y el agujero en el cielo Mario and the Hole in the Sky

By Elizabeth Rusch Author Teresa Martinez Illustrator Carlos E. Calvo Translator

Average: 0.00, 0 Ratings

Una historia real sobre un científico contemporáneo que salvó la capa de ozono y el planeta, evitando un desastre en el medioambiente.Mario Molina es un científico mexic...

!Al bebe le encanta la ingenieria aeroespacial! Baby Loves Aerospace Engineering!

By Ruth Spiro Author Irene Chan Illustrator

Average: 0.00, 0 Ratings

Disponible en edición bilingüe inglés-español, esta exitosa serie ofrece importantes e interesantes temas científicos para hacer pensar a los más peque&ntild...

!Al bebe le encantan los quarks! Baby Loves Quarks!

By Ruth Spiro Author Irene Chan Illustrator

Average: 0.00, 0 Ratings

Disponible en edición bilingüe inglés-español, esta exitosa serie ofrece importantes e interesantes temas científicos para hacer pensar a los más peque&ntild...

!Esquivel! Un artista del sonido de la era espacial

By Susan Wood Author Duncan Tonatiuh Illustrator

Average: 0.00, 0 Ratings

A playful picture-book biography of the father of space-age bachelor-pad lounge music.Gorgeously illustrated by Duncan Tonatiuh, this lively biography follows Juan Garcia Esquivel from Mexico to Ne...

Mario y el agujero en el cielo Mario and the Hole in the Sky

By Elizabeth Rusch Author Teresa Martinez Illustrator Carlos E. Calvo Translator

Average: 0.00, 0 Ratings

Una historia real sobre un científico contemporáneo que salvó la capa de ozono y el planeta, evitando un desastre en el medioambiente.Mario Molina es un científico mexic...

Mil mariposas blancas

By Jessica Betancourt Perez Author Karen Lynn Williams Author Gina Maldonado Illustrator

Average: 0.00, 0 Ratings

¡Un querido libro ilustrado está ahora disponible en español! Como si empezar a vivir en los Estados Unidos no fuera bastante difícil, ¡Isabella se encuentra con qu...

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.