Hi Sarah-B,
The book is full of slightly madcap ideas for growning things - ie one title is 'how to grow 84 plants (you chose them) in just 2 sqare foot or less'. The bottle beds involve 12 empty wine bottles, string and wrapping. Basically you make a raised bed, filling the bottles with water which then absorbs heat throughout the day and releases at night, keeping your babies nice and toasty! There are many more wierd and wonderful suggestions but the best thing is the very down to earth approach - and the fact that he has noticed that all gardening books contradict each other! It is quite pricey for a small book but worth every penny in my opinion!