I cannot think of any published preschool materials I'd recommend for a child so young, regardless of how advanced she seems. In fact, homeschool materials are not usually published for children younger than 5 or 6.
You could look into "Teach Your Child to Read in 100 Easy Lessons." It's particularly good for children who want to read but whose physical capablities are not ready for most other phonics methods.
You could also see if your local library has any Montessori books. Montessori is particularly good for younger children.