I have several questions about the board I bought from you for this project:

Which UART pin is RX and which is TX? There is nothing on the silkscreen to indicate.

Which end of the programming header is which? Again, nothing on the silkscreen to indicate.

There are pads for surface-mount phono jacks X4 and X5 but there is no indication what parts you designed those for.

The voltage regulator layout is clearly not for the part listed in the book and the one I bought.

Actually what would be really good is if you just supplied a BOM, complete with supplier and part numbers for every part on the board.