- AHS library is now open 24/7 to your children through our eBook and audiobook service. eBooks are the electronic version of a printed book, which can be viewed on a a desktop computer, laptop, smartphone, ipad, or e-book reader. Ardsley High School library uses Overdrive to deliver eBooks to our students. Each student has been issued a "library card number" and "pin number." Your child may also ask the librarian for his/her information. Click here for more information.