i had jacaranda, mcmillan, context, and successone
out of these id say get atleast jacaranda and context, jacaranda while detailed, it glosses over many points without properly addressing them...most of these are covered by contexts (and vice versa) but beware, most of the stuff in both books are beyond the syllabus, but are interesting none the less
mcmillan sucks. (only useful when you have nothing else)
edit: that was meant 2 b an emphasized fullstop.. didnt comeout too well hehehe
i never really liked success one, but its helpful at times...though i never depended on it
ive skimmed thru excel as well, but never neededd it due to the multitude of syllabus summaries available
heard good stuffs about surfing, but since i never read it, cant really comment