QUOTE(packyee @ Mar 11 2008, 04:10 AM)

Although I started to learn from Grade 1, and progressed to Grade 5, but I never took any grades exam from 1 to 4. I sat for Grade 5 straight away. I used the so-called "Little red book" or its actual title is "First Step in Music Theory" as my main reference. For exercise, I used "Music Theory in Practice Grade 5" by Eric Taylor. However, the exercises for Grade 1 to 4, I used "Music Theory makes Easy" series by Lina Ng. It is actually a very helpful and good exercise series written by a Malaysian music teacher. I do not think that you will get it in UK so any place else, besides Malaysia. However, as far as you understand English, I think you do not have much problem with the "Little red book" and Music Theory in Practice by Eric Taylor. Although English is my second language, but I still can study theory with lots of joy! Regarding to the AB Guide Music Theory, Part One is pink in colour, whereas Part Two is blue in colour. Part One is more than sufficient for you to sit for the Grade 5 exam. On the other hand, Part Two is intend for higher grade exams (6 to 8). But you still can find lots of information about instrument families in Part Two, which you need some of this knowledge for the Grade 5 exam.
Of course, there are difference between the AB Guides and Music Theory in Practice. AB Guides tell you every single things about music elements, whereas Music Theory in Practice tells you the things in the syllabus, in respective grade! When you proceed to higher grades, you will find out the book called "Theory Workbook" series (6 to 8 only), which tell you how to answer and tackle the exam questions. Whereas "Harmony in Practice" by Anna Butterworth is a book to learn Harmony when you study 6 to 8.
Anyway, all the best to your Grade 5 learning!
Well, that puts me to shame.
My english is worse than yours, and its my first language!
Ill have a loot at some of those books. Thanks both of you who replied