There are so many books on dog behaviour, training and now, dog nutrition, that it's truly difficult to know where to start. Help is at hand here.
The Good Dog Diet clearly explains the science of dog nutrition. It covers everything from how food is digested and processed to discussion on all of the myths and truths surrounding dog food.
The book especially focusses on the topic of food and whether and how it may effect behaviour.
Dogz Thinkz Differentz is about helping to clarify much of the confusion within dog training and behaviour. The book discusses whether dogs can be dominant or stubborn, how to properly deal with socialisation (what it is and what it's not), explains the difficulties with treat training concerning dogs considered stupid etc.
And here is a wee guide on house trainng puppies which covers not only all of the basics but also provides tips and guidance for those dogs who have had a relapse or are proving very difficult to house train.