Can anyone recommend a book or web site that is a good instructional resource on pruning.

My wife and I have planted quite a few deciduous and evergreen trees, a 12-tree (and growing) mini-orchard (Apples, peaches, cherries, almonds, pears and plums) and assorted bushes, and we need guidance on how, when and where to prune them for best health and production.

Thanks

Bill