Don't panic Sue.

By 'real' yeast, I assume you mean 'fresh'.

A book I would recommend is 'The Bread Book' by Linda Collister and Anthony Blake. ISBN 1-85029-532-8.

I buy my fresh yeast from Sainsbury's, In the larger stores they sell a 'block' of yeast for 99p. The block is 750g.

valmarg