I first bought 'Oyster' and was recommended 'Siren' by a good friend. Whilst 'Oyster' took a while to find it's way to my liking, 'Siren' was a winner. It is a fabulously crafted gem of an album, demonstrating different styles and themes. It is beautiful. 'London Rain' is a loud, up-beat song that you will want to sing along to, 'Heart and Shoulder' is somewhat of a lament sprinkled with reassurance, 'What a Feeling' is slow, with mellow tones, almost heart rending, 'Valley of Sound' demonstrates powerful guitar and instrumentation 'Winter Blue' is one of my very favourite songs, a lively, cheerful but passionate love song, gloriously arranged it gets played over and over again! 'Avalanche' begins quite slowly but livens up in the chorus and is incredibly catchy. 'Ruby Red' is quite quirky but has an excellent sound, and whinig lyrics...great! 'Not Only Human' is contemplative, but gorgeous. This is very definately one of my favourite albums, and a great epitome of Heather's striking talent which isn't given the publicity it deserves. It is so refreshing to hear a singer with huge musical talent and a beautiful voice.