'The book is easy to read and requires no mathematical knowledge beyond the basics. It is full of fascinating snippets from history and culture. I particularly liked the explanation for the bizzare method of scoring in tennis, which must have puzzled generations . Held's charming book deserves to be widely read. It should serve as an 'appetiser', awakening us to a new feeling for the 'inside' of numbers.' -- Paul Carline, New View 'Drawing on his anthroposophical background, the author provides a fascinating survey and commentary on the meaning and symbolism of numbers 1 to 31.' -- David Lorimer, Scientific and Medical Network Review 'Every chapter is an invitation to consider and reflect and, with or without a calculator to hand, explore for ourselves the relationships and harmonies revealed in this absorbing and very readable little book.' --Maarten Ekama, Perspectives.