The Ottawa Anesthesia Primer is an essential primary text for medical students and residents completing a rotation in anesthesia. Written by over 40 authors and edited by Dr. Patrick Sullivan, the 2023 Ottawa Anesthesia Primer updates the previous 2013 edition. Selected learning objectives can be tailored to meet the needs of the reader. Learning objectives appropriate to medical students completing a rotation in anesthesia focus on preoperative assessment, securing intravenous access, airway management, basic resuscitation skills, acute pain management and the safe use of local anesthetics. Anesthesiologists, anesthesia residents, and physicians from other specialties will find advanced topics discussing the management of the difficult airway, regional anesthesia, acute and chronic pain, management of the circulation and adult and neonatal resuscitation, to name a few of the 26 chapters. The Primer is available as an Apple or Kindle eBook, and as a printed book. Hyperlinks in the Apple and Kindle eBooks provide direct access to reference articles, instructional videos, case discussions, and other resources. Each chapter in the printed book is accompanied by a QR code image. By simply scanning the QR code image with any smart-device camera, the reader has access to the Primer's electronic resources. The QR code-enabled print book combines the best of both the traditional analog and digital worlds. The accompanying procedural videos are a valuable resource for educators who can use them as a springboard for further discussion as students gain confidence in their knowledge and procedural skills.