<prompt> Human: Hes written several. Is there an accepted order or a best one to read first?  <response>: Jack Bogles books are more about the numbers supporting the case for the indexing strategy he more or less invented. If you want the background, any of the Bogle books will do. If you want a how-to, check out The Bogleheads Guide to Investing or The Bogleheads Guide to Retirement Planning by Larimore et al. 