It is a simple powershell script used to download whole book from polish on-line library - POLONA

DownloadFromPolona

param ([Parameter(Mandatory=$true)][int]$bookUid)

$url = "https://polona.pl/resources/item/$($bookUid)/"

$bookMeta = Invoke-WebRequest $url | ConvertFrom-Json
$bookDirectory = "$($PSScriptRoot)\$($bookUid)"

New-Item -ItemType Directory -Force -Path $bookDirectory

# write metadata to file 
$additionalMetadata = "$($bookMeta.creator) `n$($bookMeta.title)"

echo $additionalMetadata > "$($bookDirectory)\$($bookUid).txt"

foreach ($page in $bookMeta.pages)
{
   $downloadUri = $page.archive_url
   $pageFileName = "$($page.uid).jpeg"
   Invoke-WebRequest -Uri $downloadUri -OutFile "$($bookDirectory)\$($pageFileName)"
}