William nickerson´s first RE book initialy printed in 1959 was

"How I turned $1,000 into 1 Million in real estate in my spare time"

in 1969 he printed a second one with 3 Millions in the title,

and finally in 1984 he printed one with 5 Millions in the tittle.

The books are out of print now, but you can get one of them by going to amazon.com and see the used offer: you can see prices arround $28.95 (1959 edition), $23.58(1969) and $67.77(1984).

There is another book written by a friend/partner of Nickerson: Albert Lowry that you should study- "How you can become financially independent by investing in real estate".

Go to amazon.com and let me know what you find.