This book is delightful reading - logical and challenging at the same time. Some will read it only for the text, conveniently skipping past the formulas. Some will go all in with partial differential equations and the works. It's not a book for the casual cosmologist - it is one for the reader who enjoys an intellectual challenge. What's remarkable is that the text is logical, complete and intriguing throughout. Even when the mathematics is beyond your conception, the text will keep you on the course.