\documentclass[twoside]{book}
\usepackage[utf8]{inputenc}

% \usepackage{showframe}
% \renewcommand*\ShowFrameColor{\color{red}}

% Let's set up our page size
\usepackage[
	letterpaper,
%	A4,
	bindingoffset=15mm,
	textheight=250mm,
	textwidth=175mm,
	top=14mm,
	footskip=5mm,
	marginparwidth=0mm,
	marginparsep=0mm
	]{geometry}

% Let's set up a loop to output the number of pages we need
% https://texfaq.org/FAQ-repeat-num
% https://ctan.org/pkg/forloop
% Output a variable value: https://sodocumentation.net/latex/topic/9224/counters--if-statements-and-loops-with-latex
\usepackage{forloop}
\newcounter{ct} % Create a counter for our loop
\newcounter{pg} % Create a counter for our page numbers
\setcounter{pg}{1} % Change the value from 0 to 1
\def\pgct{2} % Set this value to the number of leaves you want + 1
% Note: a "leaf" is composed of two double-sided pages. 

% Select an appropriate monotype font
\usepackage[varqu]{inconsolata}

% Build tables
\usepackage{tabularray}
\setlength{\parindent}{0pt} % Remove space in front of tables

\author{Kenneth John Odle}


\begin{document}
\pagestyle{empty}
\ttfamily

% Begin our loop
\forloop{ct}{1}{\value{ct}<\pgct{}}{


% This is the right page header
\begin{tblr}{
	width = 175mm,
	colspec = { | X[10,r] | X[40,r] | X[10,r] | X[30,r] | X[10,c] | },
	hline{1,3} = {1-5}{0.5pt},
	hline{2} = {1-4}{0.5pt},
	rows = {5.5mm, m, rowsep=1.5pt }
	}
TITLE: & & BOOK: & & Page \\
PROJECT: & & DATE: & & {\LARGE \arabic{pg}} \\
\end{tblr}
\stepcounter{pg}

\newpage

% This is the left page header
\begin{tblr}{
	width = 175mm,
	colspec = { | X[10,r] | X[40,r] | X[10,r] | X[30,r] | X[10,c] | },
	hline{1,3} = {1-5}{0.5pt},
	hline{2} = {1-4}{0.5pt},
	rows = {5.5mm, m, rowsep=1.5pt }
	}
TITLE: & & BOOK: & & Page \\
PROJECT: & & DATE: & & {\LARGE \arabic{pg}} \\
\end{tblr}
\stepcounter{pg}

\newpage

% End our loop
}

\end{document}