Hi please re-read #3 in our Terms and conditions for this
offer:
"Free books are sent once you have signed up, made your first deposit, and played in real money games or tournaments enough to earn 50 Frequent Player Points (FPPs). We receive this information from the site approximately twice a month so please be patient. "
So yes, you do need to make a deposit. The book offer doesn't have a minimum deposit, so whatever minimum that the site allows is applicable. Note that if you have previously registered with the site you will not be eligible for the bonuses. You must use the Green button on our bonus page to get to the site and register at that point.