A common problem at the bridge table is deciding how high you can safely compete to in the competitive auction. The STYLE - its odd to see CAPITALS used to shout important statements at READERS but maybe that's the American way - is to SAY THE LEAST, irritating ... there are other issues of presentation and layout you may find annoying.
Difficult at the bridge table are those times when opponents get busy or pre-empt - personally I always feel as if I am dealing with each situation individually with little to guide me. This book is a useful guide to those situations providing a scientific basis for action and well worth buying - but there is no easy fix for thinking.
During auctions (good) players assess there hands using points, LTC, looking at there intermediates, gauging distribution, listening to the bidding or lack of it, imagining hands, adjusting according to controls held and other methods, eyeing the opponents (no ... not that way!) - The law of total tricks provides one additional tool to guide you in a competitive auction ... but it should be used in conjunction with your assessment of opponents, the rest of the field, etc.
If you are new to the total tricks principles then "Control the bidding" by Paul Mendelson is possibly a better book to start with - and I think one that is of greater use in the competitive auction ... (but still collating the comparative evidence)