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Re: acsm files

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From: Tony Olivero
Date: May 18, 2012 2:13PM

Lucy,

I don't believe acsm is a ebook file per se, I believe it is an
authorization key used to instruct Editions where to download the book.

From the FAQ at http://www.ereadable.com/info/FAQ.asp
Why do I get a file with the extension .acsm when I download an Adobe PDF or
ePub eBook?
When you start to download an Adobe PDF a small file with the extension
.acsm is first downloaded. This is used by Adobe Digital Editions to send
the activation ID to the delivery server which will use that ID to generate
an encrypted PDF/ePub eBook, which is then downloaded to your PC. If your
computer is asking you where to save the .acsm file then your Adobe Digital
Editions may not be installed correctly or not yet authorized. Often you can
solve this issue by simply setting your computer to always use Adobe Digital
Editions to open this type of file (in Windows XP, for instance, right click
on the file and choose Open With, select Adobe Digital Editions and tick the
box to tell Windows to remember the setting; for other operating systems
please read your documentation).

Hope this helps.

Tony