I`m Ivan Hendrawan
(i`m an Indonesian, recently i`m studying EL with Mrs. Tjenny Tjahyono, the best EL teacher i`ve ever known) 

Here are books from my personal collection:

• Electone Sound Inn Fan 10: Fantastic Sound
  for EL-50/EL-90 - Grade 6
  Contents:
  
  1. Main Street Electrical Parade
     (Electric Fanfare ~ Baroque Hoedown ~ Mickey Mouse March)
  2. Voyager
  3. written in Japanese (translation: Peter Rabbit and I)
  4. written in Japanese (i believe it`s about sea/ocean)
  5. Comical Train
  6. written in Japanese (translation: Voyage of Wind)
  7. written in Japanese ()
  8. Kuda Lumping

• Electone Sound Inn Fan 13: March Sound
  for EL-90/EL-87/EL50/EL37 - Grade 6
  Contents:
  
  Same as the "march sound you`ve listed except there isn`t "Star Wars Main Title Theme" It also have different cover (also the "fantastic sounds" i have listed above)

• Electone Sound Inn Fan 8: Disney Songs 2
  for EL-50/EL-90 - Grade 7-6
  Contents:
1. It`s A Small World
2. So This Is Love
3. The Second Star To The Right
4. Once Upon A Dream
5. When You Wish Upon A Star
6. Who`s Afraid Of The Big Bad Wolf ?
7. Supercalifragilisticexpiadilocious
8. Alice In Wonderland
9. Whistle While You Work
10. Under the Sea

• Electone Sound Inn Fan 18: Latin
  for EL-90/EL-87/EL-70/EL-50/EL-37
  Grade 7-6 - Contents:

Same as Evi Wiratma has listed but i think she forgot to type the last song "Carioca"
(btw I thought she is an Indonesian just like me, am I right? )

Intermezzo: Do u know the "Kuda Lumping" title ,composed by Marcel Aulia (an Indonesian), is Indonesian for the name of a Javanese dance (the translation "Javanese Horse" is not quite right)? Btw it isn`t a real horse but it is a mystical traditional Javanese dance using fake horses...

I think there is a slightly different between Electone Sound Inn Fan and Electone Sound Inn, isn`t it?  (yes -glenn)

Back to the topic!!

• Collection Of Electone Original Works vol. 1
  Grade 5
  Any model of Electone
  Contents:
1. From "Adventure of the Seven Drawfs"
2. Merry-go-round
3. Early Spring
4. Waltz In My Memory
5. Chorale
6. A Tale of the Peaceful Rain
7. Soldier`s Dream
8. Sonata
9. Spring in the Field
10. The Hunters 

• Collection Of Electone Original Works vol. 3
  Grade 5
  Any model of Electone
  Contents:
  
  1. A Legend of Nome
  2. A Merry Violin
  3. A Dandy Cat
  4. March Of Aspens
  5. Dance of Fairies
  6. A Path
  7. Fairies in Spring
  8. Athletic Meeting in Animal`s Village
  9. A Ball in The Land of Stars
  10. On the Spring Breeze

Intermezzo: Collection Of Electone Original Works, all of which were first performed at Yamaha Junior Original Concerts. Each year JOC features many pieces marked by fresh ideas and free expression-pieces which are a delight to hear and play. The best of these are collected in this book.
Do you know: in the Yamaha grade examination we should play one of the 2 choosen songs from this book? (besides one of the 6 choosen songs from any other el-books)

• Electone sight playing exercises 100 vol.1~10
  Grade ? (but I think it suitable for grade 5~3 especially during the preparation of Yamaha Grade Examination)
  Any model of Electone
  Each vol. contents: 100 Exercises of sight playing
  
• Electone Grade 5-4-3 New Improvisation Exercises vol.10
  Grade 5-4-3
  Any model of Electone
  contents:
  1. 50 Exercises of Improvisation for each grade (total: 150 exercises of improvisation)
  2. Exercises of Motif Development (total: 133 exercises)
  3. 8 Patern Examples of development of a motif
  4. 8 Full Example of development of a motif 

That`s it (phew...)

Best Regards,
Ivan