I have a book called Little Dogs: Training your pint-sized companion, by Deborah Wood. The chapters include:
Ch 1 The Wonderful (and Challenging) World of Small Dogs
Ch 2 Special Issues for Small Dogs
Ch 3 Food, Fun, and Results
Ch 4 Luring, Learining, and Communicating
Ch 5 Five Must-Know Behaviors
Ch 6 Housetraining Your Small Dog
Ch 7 Solving Common Behavior Problems
Ch 8 Training Your Small Dog for the Real World
Ch 9 13 Easy Tricks and Games
Ch 10 Cool Stuff to Do With Your Trained Dog
Ch 11 Advanced Obedience Training
Ch 12 Reflections on Life With Small Dogs
What I have read of it (I am one of those people who don't necessarily read the whole book) has been good. The one think that I have found with Deni since she is so small is to take the book's advice and train her on a small table (basic commands such as sit, down, short stays) and once she gets those down to begin the commands on the floor, it really saves my knees and back which are feeling the effects of aging.
I originally got the book for Ally who at 6 months was about a pound bigger than Deni (2.4# last week) but Ally picked up the commands very quickly without table training and now at a couple weeks short of one year responds to hand commands (no verbal) and will be finishing her adult obedience class next week. I'm finding that Deni gets distracted more easily, and takes longer to understand the commands. She responds to some hand commands, but does better with verbal commands especially when she's on the floor because of her diminuitive size.
You can find the book online at Amazon and Barnes & Noble. HTH!!