课本问题求助~

请教下各位 有人知道今年曼大U1一本经济1200和两本写作ENGL 0930的书是新书吗  也就是跟上届的不同是么？

Course Code: ECON 1200
Course Name:
PROFESSOR: COMPTON, JANICE SECTION: A01
TITLE: PRINCIPLES OF MICROEC. W/CONNECT & LYRYX AUTHOR: FRANK, ET AL
EDITION: 3RD CDN ISBN: 9780071057615 REQUIRED/OPTIONAL: RQ

Course Code: ENGL 0930
Course Name:
PROFESSOR: DORCICH, LISA SECTION: A06
TITLE: SUNDANCE READER W/MLA UPDATE AUTHOR: CONNELLY
EDITION: ISBN: 9780495899860 REQUIRED/OPTIONAL: RQ


PROFESSOR: DORCICH, LISA SECTION: A06
TITLE: CONCISE CDN WRITER'S HDBK W/ STUDENT WKB AUTHOR: MESSENGER
EDITION: ISBN: 9780195439885 REQUIRED/OPTIONAL: RQ

曼大二手书店没有卖的。
ECON 1200 买书的时候看好了。

ls我发的那个就是新书的封面，按照这个封面去买就没错。