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My debt to Mathew Butterick and his book Practical Typography are both obvious and immense. I’ve never met the gentleman, but this project would not have been possible without his example, nor without his beautiful font Valkyrie.

Thank you also to Tal Ater, whose Building Progressive Web Apps guided me through the slow process of doing just that.

A big hat tip to Jeremy Keith. Midway through developing this so-called Progressive Web Book I discovered that he had already beat me to the punch, and moreover, way back in 2016. His Resilient Web Design is an impressive achievement and a terrific, informative read.

Finally, a big thank-you to the incredible community of web designers and engineers who generously share their knowledge and expertise. They include: