You've probably figured out there's plenty of free information on the web, some of it more reliable that others! Use credible government or organization sites such as those listed below.
Reference materials such as handbooks, manuals and encyclopedias provide overviews of topics, background information, quick facts, and references to further works. The library subscribes to a large online collection of reference resources called Credo - check out the Autism Topic Page, for example, where you'll find background information and a collection of articles and entries from reference texts as well as searches in the library catalogue and relevant databases. In our collection you'll also find print and digital copies of reference works such as those listed below - all included in the library catalogue.