Catree,
I do not aware that there is another assignment solution book accompanying Hull's Option, Future & Other Derivative, apart the Solution manual book. Can you give us an ISBN# to widen our perspectives?
Sure, no problem. The Solution Book of Assignment Questions is published by the Pearson and its ISBN is 013814589X. Thant's the 7th edition. I am totally OK with either 6th edition or 7th edition for that book. Please let me know if you get one.
You might get a chance to look at the 5th edition of the assignment solution, which can be downloaded from this forum.