Ebook: Teach Yourself VISUALLY Calculus

I had calculus several decades ago and bought this book just to get back into thinking mathematically for a past time.Not enough practice problems and on page 86, the first example, there is an error in the problem. I recognized the error because like I said I had Calculus decades. There are no errata sheets available.Better to purchase something like "Idiot's Calculus" by W. Michael Kelley.