*This offer is valid only for individual customers and redeemable only on apress.com for for select titles (selected 2020 bestsellers). Reference works, handbooks, encyclopedias, forthcoming titles, titles affected by fixed book price laws, and subscriptions are excluded from the promotion, as are Bulk or eBulk orders. This offer does not work in combination with other discounts or gift cards. The currency in which your order is invoiced depends on your billing address, not necessarily your home currency. Institutions such as libraries and corporations are excluded from this promotion. For institutional sales please visit Apress Corporate Sales. If discount is not applied automatically, please use code TOP2021.