* Discount code LEARNING confers a 45% discount off the list price of eligible print books and eBooks purchased on ciscopress.com. Discount not valid on Book + eBook bundles, Book/eBook + Video bundles, video training, software, non-discountable products, Rough Cuts, Safari Books Online, or any title featured as eBook Deal of the Week. Discount code may not be combined with any other offer and is not redeemable for cash. Discount offer expires 11:59 p.m. EDT September 15, 2020. Offer subject to change.