Help on crashing

Hi, I’ve installed it, I’m loving it because of it’s simplicity, beautiful interface and everything. But I am hating it because it crashes every 5 to 10 minutes or so. I don’t know why. Information shown after crash is not readable for normal human beeing. Why this is not working as it should? I mean Pages are working without any problems, Numbers too? Why iBook Author isn’t? Why is this crash always happening? Has anyone the same problem with it?
By the way - my configuration is Mac Book Air, 13’’, 4 GB RAM, i5.

maxcrane about iBooks Author, v2.1.2