To be honest, there's a limit to what a book about dancing can actually teach you: if you're a complete Scottish country dancing beginner, not even step-by-step diagrams are going to convey the intricacies of the moves and spins, even if, like this manual, tries its best with arrows and diagrams. You really need to see dancers in action, and hear the music, to get how the individual sections all fit together.
However, having said that, of all the guides I've read in a vain attempt to learn in a hurry, The Swinging Sporran is the most useful. It breaks down all the classic dances you would need to know for a formal Scottish reeling night into basic steps - Hamilton House, the Eightsome Reel, Reel of the 51st Division, Dashing White Sergeant, etc - and offers some tongue-in-cheek advice straight from 1973 about what to wear, and what to expect. Not much has changed; after all, a kilt is a kilt is a kilt. This is definitely an introductory guide to the traditional world of Scottish Country Dancing, however; you'll need a different book if you're heading for a more informal folk dance ceilidh, where Strip the Willow, the Gay Gordons, etc, are more usual.
But with a CD of appropriate tunes to put to the steps, this is a handy little book to keep in your sporran for reference, and a good starting place for anyone with an interest in Scottish country dance.