The “Adult-Gerontology Nurse Practitioner Certification 3rd Ed” by Maria T. Codina Leik is a comprehensive study guide published by Springer Publishing Company in 2017. This book, aimed at advanced-level professionals in the field of gerontology and nursing, offers a thorough preparation for the exam by providing detailed information on the subject area. With digital access included, this third edition publication is a valuable resource for individuals looking to enhance their knowledge and test preparation in the field of adult-gerontology nurse practitioner certification.