'This book is filled with the geometric jewels of fractional and integral Hausdorff dimension. It contains a much-needed unified notation and includes many recent results with simplified proofs. The theory is classically and rigorously presented with applications only alluded to in the introduction. Each chapter contains a short and important problem set. This is a lovely introduction to the mathematics of fractal sets for the pure mathematician.' American Mathematical Monthly ...by far the most accessible mathematical account available and therefore is an invaluable addition to the literature. Science ...a lovely introduction to the mathematics of fractal sets for the pure mathematician. American Mathematical Monthly