With an eye popping 1.5 million subscribers, John Mauldin provides investors an insightful view into the economy and Wall Street through his three newsletters:

• Thoughts from the Frontline is a weekly economic and investment newsletter with over 1 million readers. Ahead of the pack in predicting the mortgage and credit crisis, this popular newsletter gave readers a unique glimpse into the future and an opportunity to take profits before the crisis became a bloodbath.
• Outside the Box, published weekly, highlights one essay from another analyst.
• The Accredited Investor, published quarterly, focuses on the world of hedge funds and private investors. This letter is for accredited investors who generally have a net worth of $1,000,000 or more, or made $200,000 or more per year in the immediate preceding two years.

Each of Mauldin's newsletters are free, so for an investment of your email and a little time, you will join a large and growing global audience.