Downloading books from West Bengal Public Library Network

[Nityanand Misra]

Dear list

I was searching for आथर्वणोपनिषदः edited by Jibananda Vidyasagara. I found the book here. 

http://dspace.wbpublibnet.gov.in:8080/jspui/handle/10689/21995

Like all books on West Bengal Public Library Network site, the book is available as multiple PDFs. It is cumbersome to download seven PDFs and then combine them together every time for each book one wants from wbpublibnet. 

Is anybody aware of any tool to download books from the website? Like the DLI Downloaded by Munish Chandel (which is now not very useful as DLI offers links for complete PDFs now)?

Thanks, Nityananda

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Nityānanda Miśra