Amazon.com doesn't ship to Norway?
Hm doesn't seem too expensive, although it doesn't seem to say how much is in one bottle, and I wonder if £6.95 is more than $6.95...
Anyway, if you can afford it, the four Yantra Yoga items I posted links to above are all well worth it if you want to learn on your own, have a good rug or wool Yoga blanket, somewhere to practice, and sufficient time to do at least a good 90 minute session everyday.
Yantra Yoga could even be one's main practice by adding Nine Purification Breathings, Guru Yoga, Om E Ho Shuddhe..., Three Roots/Bodhicitta, and Dedication of Merit.

SARVA MANGALAM
Without clairvoyance, we cannot work for other sentient beings - Khunu Lama
Suddenly you will know the different knowledge without study - Thog-'bebs
One may now accomplish the welfare and instruction of all sentient beings, spontaneously and without effort, by simply being, that is to say, by manifesting one's enlightened nature through spontaneously emanating an infinity of Nirmanakaya manifestations - Vajranatha