Bent cover. The rest of book is in great shape. No writing/highlights The “Calculus Volume 1 by OpenStax” is an official print version of a textbook published in 2016 by OpenStax. Written by authors Gilbert Strang and Edwin “Jed” Herman, this paperback book is full of color and presented in English. It covers the subject area of education, specifically focusing on the general subject of calculus. With its high-quality content and format, this textbook is a valuable resource for students and educators looking to explore the complexities of calculus in a clear and engaging manner.