I know you're a professional writer an' all, but I'm sorry to tell you I buy all my books second hand, with very rare exceptions that didn't coincide with possession of a gift card for a bookshop. I'll keep you in mind whenever I get another.
Being a professional writer has nothin' to do with my book buying habits. I check out most of my books from the library. A book certificate allows flights of fancy to take precedence over practicality: a third illustrated edition of The Secret Garden, a taxonomy of lavender, and a coffee table book of Klimt prints came into my life thanks to book certificates.