D,. H.. · D. Hobbs · Mr Derek Hobbs
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Evaluation Pack 1 | 978-0-435-81215-7 | 2006 | Steve Block |
| Evaluation Pack 2 | 978-0-435-81237-9 | 2004 | " |
| Opus 1 Progression in Music 11 - 14: Teacher's Resource File | 978-0-435-81211-9 | 2006 | Karen Brock · Chris Hiscock · Peter Roadknight · Steve Block |
| Opus Pupil Book 1 | 978-0-435-81208-9 | 2006 | Karen Brock · Chris Hiscock · Peter Roadknight |
| Opus: Student Book 2 | 978-0-435-81230-0 | 2007 | Steve Block · Karen Brock · Chris Hiscock · Peter Roadknight |
| Opus: Student Book 3 | 978-0-435-81250-8 | 2007 | Rob Blythe |
| Opus: Teacher File & CD-ROM 3: Progression in Music | 978-0-435-81253-9 | 2007 | " |