{{/* Recursively creates a slice of pages under given page */}}

{{ define "book-menu-recurse" }}
  {{ if not .Page.Params.BookHidden }}
    {{ if .Page.Content }}
      {{ .Scratch.Add "BookPages" (slice .Page) }}
    {{ end }}
    {{ range .Page.Pages }}
      {{ template "book-menu-recurse" (dict "Scratch" $.Scratch "Page" .) }}
    {{ end }}
  {{ end }}
{{ end }}

{{ $scratch := newScratch }}
{{ template "book-menu-recurse" (dict "Scratch" $scratch "Page" .) }}
{{ return $scratch.Get "BookPages" }}