楼主找１９９６年的书？　有点老了吧。
可以弄到这２０１１年的：　Mathematics for Economics and Finance　by Michael Harrison, Patrick Waldron

http://www.amazon.com/Mathematic ... back/dp/B00DU84ELU/

It's quite a good book but personally, I don't find this book sufficient for students reading LSE mathematics courses. I don't think there is any electronic version that could be readily access online. Depending on your course syllabus, you should be able to find substitutes for this book.

Good

Not for LSE actually, but thanks for the advice!

No worries. What course are you undertaking with this textbook?