@Karma Senge
I will third both @Ned Carey and @Giovanni Isaksen . Ray Alcorn's Dealmakers Guide is one of the best that I came across so far. Not easy to find on secondary markets, but it comes up once in while.
Also, a good place to start is Ken McElroy's The ABCs of Real Estate Investing; his other book The Advanced Guide to Real Estate Investing did not impress me at all (plus the book has many mathematical errors), but I started reading it after going through most of Alcorn's material.
Garrett Sutton's The Loopholes of Real Estate gives interesting tactics in REI.
I have Lindahl's books: Multi-Family Millions, Emerging Real Estate Markets; as well as Apartment House Riches course. The books are good and give good info and guidance. The course, I definitely wouldn't spend full price on as a most material covered in books. You do get some extras, but I a not sure it's worth $1400 upfront. If you look on secondary markets, I am sure you can get one for a significant discount.