WEB application for eBook purchasing

This is what a business in Japan was looking for in their web design

For private project, I have a plan to make WEB service that makes easy to purchase some or many books at once.

* Problem I want to solve
- I feel Amazon Kindle store is too poor to find books, especially for volumes of comics.

- That page on Amazon shows me many books but same title with different volumes.

- Check following links which shows same titles but many volumes:
- Japanese comic page. http://www.amazon.co.jp/b/ref=amb_link_65707449_1?ie=UTF8&node=2430844051&pf_rd_m=AN1VRQENFRJN5&pf_rd_s=left-1&pf_rd_r=01JPNM78BPMCBMV7JS2C&pf_rd_t=101&pf_rd_p=122701989&pf_rd_i=2293143051
- Or think about Perry Rhodan series.
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dstripbooks&field-keywords=Perry+Rhodan

- If I don't have vol.1 of a comic, I must find the vol.1 in that page.

- And also I have vol.1 to 10 of the comic , I must find vol.11 in that pages.

- It's too annoying.
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