I don't know whether you're in the UK or US ...but here's a selection:
Employment for Individuals with Asperger's Syndrome or Non-verbal Learning Disability: Stories and Strategies by Yvonne Fast and etc.
Asperger's Syndrome Workplace Survival Guide: A Neurotypical's Secrets For Success by Barbara A. Bissonnette
Asperger Syndrome and Employment: Adults Speak Out About Asperger Syndrome (Adults Speak Out about Asperger Syndrome) by Genevieve Edmonds and Luke Beardon
Asperger Syndrome Employment Workbook: An Employment Workbook for Adults with Asperger Syndrome: A Workbook for Individuals on the Autistic Spectrum, Their Families and Helping Professionals by Roger N. Meyer
Asperger Syndrome and Employment: What People with Asperger Syndrome Really Really Want by Sarah Hendrickx
Asperger's on the Job: Must-have Advice for People with Asperger's or High Functioning Autism and Their Coworkers, Educators, and Advocates by Temple Grandin and Rudy Simone