[seas1]

I'm new on this forum, and first time user of e-book reader. I buy Kobo eReader Touch few days ago, and I have a problem. I have some e-books on my computer, around 100 of them, and they are all in MOBI format. I load this books on my new reader and I'm able to open them, but big part of the text is just a some strange leters trown in without any meaning. Let's say that 40 % of text is like that, just leters and simbols without any meaning. the rest is OK.
What causing this problem?
I have Kindle e-book reader app instaled on my computer, and I can open and read all this books without problem on my computer, but not on my new KOBO

Thank you in advance
SEAS