The availability of Stereograms Nos. 1-20 has extended from the original editions (suitable for bass trombone, euphonium, tenor trombone with ‘f’ attachment, bassoon, cello, or bass), to a special edition for tuba!
Stereograms have been described as “Bobby McFerrin meets the Bach Cello Suites”, and are rhythmic etudes which contain self accompaniment and give the aural illusion of two or three separate parts within a single melodic line.
Carefully transcribed and adapted by Professor Kelly Thomas, of the 
University of Arizona and his former assistant Will Houchin, these lower voiced Stereograms have been recast into appropriate ranges and keys for tuba and are now available for purchase on-line! American trombonist and educator Clayton Lehman has e-published these important new contributions to tuba literature as ebooks books from his new locale as a student in China! The links are as follows:
The following is a page that links to all four collections of Stereograms for Tuba on Amazon Kindle:
http://www.amazon.com/David-Brubeck/e/B00DK2Q91E/ref=ntt_athr_dp_pel_pop_1
The next link is for #1-5 (Collection 1) that is available through B&N Nook:
http://www.barnesandnoble.com/w/stereogram-nos-1-5-david-brubeck/1117991176?ean=2940148256861
The next link is for #1-5 (Collection 1) that is available through iBooks/iTunes:
https://itunes.apple.com/us/book/id792687527
