To get the Fishin' For Profit book go to Nikki Nack's store (open from 9 a.m. to 5 p.m.). After you buy it, find O'Phil Mclean. Give it to him and he will give you a job. Note: You must get the goals from him first. To do this, talk to Salty. Later in the game, you will be offered by Nikki Nack to buy the Waterfront Villa for 3,000 Simoleons.