This book is in simple terms your one stop guide to sports arbitrage trading whether you're a novice or experienced trader. There's quite a large section on finding your own arbs, but yes, if you want your trading to earn more than pocket-money you will have to spring for some software to find arbs for you automatically.
If you've just got a passing interest in sports arbitrage, my advice is to skip this book and read what's available for free (just google for 'sports arbitrage world'). But if you're serious about becoming a trader, this book will help a lot.