Pimsleur Language Learning Programs are published by Simon & Schuster Audio covering over 40 different languages in over 150 different programs. Almost all of their programs are available on cassette & CD, while the 25 titles in their Quick & Simple series and Spanish I, II, & III are available for Digital Download on Audible.com. The Pimsleur Method developed by Dr. Paul Pimsleur is much more than a simple listen & repeat language learning process. Dr. Pimsleur developed a method of language learning which continually reintegrates all that you've learned so you must draw from your memory at regular intervals to actively retain the language. In each lesson you actually converse out loud with speakers of the language as they aid you in what to say and teach you new vocabulary.
For a good overview of Pimsleur audio programs click here. Pimsleur has a number of different series which vary in length & difficulty including Pimsleur Express which is 1 Hr. & 15 Min. long, Pimsleur Quick & Simple which is 4 Hrs. in duration, Pimsleur Compact which is 5 Hrs., Pimsleur Instant Conversation which last for 8 Hrs., and finally Pimsleur Comprehensive which includes 30 lessons for 15 hours of language learning. Many of the Comprehensive Language Programs are available in levels I, II, & III for varying degrees of skill. Pimsleur has also published 35 English as a Second Language Programs in both their Quick & Simple series and their Comprehensive programs for speakers in over 15 languages. Pimsleur products can be purchased directly from their website or they can be ordered by calling 1-800-831-5497. The also have a Pimsleur order form you can download and fax your order in to 1-856-824-2289.