\documentclass{article}
\usepackage{grffile}
\usepackage{pdfpages}
\begin{document}
\includepdf[pages=-]{build/pdf/The Beatles/Doctor Robert.pdf}
\includepdf[pages=-]{build/pdf/Grateful Dead/Fire on the Mountain.pdf}
\includepdf[pages=-]{build/pdf/Karen O/The Moon Song.pdf}
\includepdf[pages=-]{build/pdf/Barrett Strong/Money (That's What I Want).pdf}
\includepdf[pages=-]{build/pdf/John Denver/Leaving on a Jet Plane.pdf}
\includepdf[pages=-]{build/pdf/Smokey Robinson & The Miracles/I Second That Emotion.pdf}
\end{document}
