It seems like, you might have more luck with books than with trying to piece things together from bits and pieces on websites - I possibly don't know any books about Sumerian mythology, sorry, but searching your local library or alibris.com (because Amazon are crooks) might get you something that'll give you a general idea of what archaeologists know about Sumer and its mythology, and give you somewhere to start... Source: about 1 year ago

I buy used books at alibris.com, but, apparently, they work with sellers (20 USD per annum). I takes an investigation to check out those. Source: about 1 year ago

Highly recommend checking out alibris.com as well. Source: about 1 year ago

I collect first edition / first printings of rare science fiction from the 60s/70s/80s. I've found abebooks.com and alibris.com to both be excellent when trying to find obscure pieces. Source: about 1 year ago

Drive-by comment to recommend http://alibris.com as a great used book, music, dvd source. Source: about 1 year ago

I have 827 (thank you librarything.com for the catalogue) and 7 dictionaries in four languages accumulated over 50-odd years. I have several matching sets I’ve bought as they were issued. You just have to (a) buy books and (b) live a long time. Source: 11 months ago

I use librarything.com to keep track of books I read. One of the things I like most about the site is that it basically works like your own personal library card catalog. You can create "collections" as well as tags to organize your books. You can easily add books by edition, format, or ISBN to your library. And if you have physical books, you can scan the barcodes to add them to your library instead of entering... Source: about 1 year ago

Take a look at librarything.com, probably perfect for small libraries. Source: over 1 year ago

i'll also put in a plug for librarything.com. I prefer it way more than goodreads. It feels less more indie and far smaller. Source: over 1 year ago

I believe you can make comments vs. Private comments on librarything.com. You can also set your entire library to private. Source: over 1 year ago