It's called Russian Without Toil (1950s), the older Assimil are meant to be far better than the new 'with ease' ones. And you will be able to find this as an ebook and audio for free somewhere online (aka, not completely legal, torrents/etc.), or pay somewhat of a large amount for the no longer in print course.
Otherwise, there are heaps of other courses, such as Linguaphone is very good (particularly the old ones) do find these and not the all-talk versions, as well as Teach Yourself and Living Language.
If you want to learn spoken first (a lot do), go with Pimsleur, or use this along with other courses.. It's good to use a few at the same time..
A note, most newer courses of anything are pretty bad, so find older stuff from the 60s-80s! There are heaps of ways to learn really.. just this is preferred from what i've read
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And just wondering, why learn Russian?