Wavelets made easy, the title is sarcastic. It only uses high school algebra or basic trig functions? WRONG! It starts out as advanced text to 2nd year grad students or those working on a PhD, almost every page has unproven formulae, its up to YOU and your team of 10 or so grad students and billions of dollars in lab tools and resources to double check the work they provide.Professors of Math or those with 20 years of wavelet research may be able to mull thru the book in a few months perhaps. The style of writing is typical of authors who dont want to explain the concept but only pretend to appear smarter than they really are.