Janet Portman Books

"Protecting California tenants' rights since 1971! Many tenants have to deal with roommates who don't pull their weight, neighbors who routinely engage in illegal activities, landlords who don't kn...

The California landlord s law book

By David Wayne Brown

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Every landlord s guide to finding great tenants

By Janet Portman

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"Searching for the perfect tenant? Get the only book devoted to the most important decision a landlord can make! Landlords face many challenges, but choosing new tenants has the greatest potential...

Leases rental agreements

By Marcia Stewart

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Discusses preparing a lease or rental agreement, choosing tenants, getting the tenants moved in, and changing or ending a tenancy.

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.