ISA offers a variety of educational materials and products to help arborists improve their arboricultural knowledge and experience. Every month we will feature a product or group of products. In January, ISA will feature the Arborists’ Certification Study Guide, Fourth Edition by Sharon J. Lilly, Corrine G. Bassett, James Komen, and Lindsey Purcell.

The fourth edition of Arborists’ Certification Study Guide is a must have and provides a strong foundation and reference for all tree care professionals. Available in both print and digital formats, this publication is a complete and up-to-date resource that is designed to help people study for the ISA Certified Arborist® exam. Purchasers can save 10% when they use the promo code STUDY2025 (expires 31 July 2025).

Each chapter includes learning objectives, key terms, sample test questions, a workbook section, and challenge questions. To further help arborists prepare for the exam, each chapter contains additional recommended resources.

This publication is fully illustrated in color with more than 440 illustrations and includes a comprehensive glossary of arboricultural terms.

Please note: Any educational or preparatory material, whether published by ISA or not, should NOT be considered the sole source of information for an ISA certification examination. This publication and the ISA certification program exams are developed through separate processes and entities.