8 1 10 Michael Harris Primary Author David Mower Primary Author mixed material 9780582846784 Essex Pearson Education Limited 2008 41iQoWNBbzL.jpg.jpg Michael Harris Primary Author David Mower Primary Author mixed material 9780582846777 Essex Pearson Education Limited 2008 474-430.jpg.jpg Michael Harris Primary Author David Mower Primary Author mixed material 9780582846760 Essex Pearson Education Limited 2009 cover_challenges_students_book_2.jpg Pre-Intermediate Students' Book Michael Harris Primary Author David Mower Primary Author mixed material 9780582854192 Essex Pearson Education Limited 2013 9780582854192.jpg.jpg Intermediate Students' Book Michael Harris Primary Author David Mower Primary Author mixed material 9780582854154 Essex Pearson Education Limited 2013 9780582854154.jpg.jpg Upper Intermediate Students' Book Michael Harris Primary Author David Mower Primary Author mixed material 9780582854239 Essex Pearson Education Limited 2013 9780582854239-us.jpg.jpg Beginner Students' Book Michael Harris Primary Author David Mower Primary Author mixed material 9781405832007 Essex Pearson Education Limited 2013 9781405832007.jpg.jpg Elementary Students' Book Michael Harris Primary Author David Mower Primary Author mixed material 9780582854116 Essex Pearson Education Limited 2006 cover_opportunities_education_for_life_elementary_students_book.jpg