The product is a brand new hardcover textbook titled “Calculus (4th edition by Michael Spivak).” Published in 2008 by Publish or Perish, Inc. ®, this textbook is used in the subject areas of education and mathematics. With 668 pages, this textbook covers the fundamentals of calculus and is written in English by author Michael Spivak. The publication is the 4th edition, making it an updated and comprehensive resource for students and educators in the field of calculus. Not sealed but not used