*This offer is valid only for individual customers and redeemable only on apress.com for available Apress books or eBooks. The currency in which your order will be billed depends on the billing address linked to your payment method. Reference works, forthcoming titles, titles affected by fixed book price laws, and subscriptions are excluded from the promotion, as are Bulk or eBulk orders. This promotion does not work in combination with other discounts or gift cards, or with Bulk or eBulk orders. Institutions such as libraries and corporations are excluded. For institutional sales please visit Apress Corporate Sales. Offer is available only through June 30, 2021. If discount is not applied automatically, please use code NC21APR.