To be honest you don't need any books on raising ducks - are planning to raise just some for eggs? Meat? Mostly pets?
Have you had chickens before? Or no animals (especially poultry/birds) at all?
Mine eat mostly chicken food (layers pellets), but will also free range and hunt for flies, slugs and snails - which is great for the garden.
If free ranging they are fantastic, but in small spaces (like a small chicken/duck run) they will turn it into stinky mud bath in no time.
They obviously need clean water - at least a bucket - must be enough to submerge their head. My ones have a baby bathtub which is big enough to last them whole day.
What type of ducks are you looking for? Bantam size? Medium egg laying? Large ornamental/meat type?
I have kept exhibition Aylesbury, lots of muscovies (my favourite!), Khaki Campbell, saxons and others.
Watch some videos on YouTube. You will find more useful information on YouTube and this forum than you would in most books. Check in the library - you'd be surprised eat you can find - I read a book on ferreting in Leicester city Council library.
Hope this helps