I did my reiki about 6 years ago (levels I & II together in Byron Bay, Australia over just 2 days) and don't really want to spend about £200 refreshing my memory! Can anyone advise me on whether to buy this book (see the Amazon \link{http://www.amazon.co.uk/exec/obidos/ASIN/0974256919/qid=1149018197/sr=8-1/ref=pd_ka_1/202-0984627-5066221\link}?