The American Research Center (where I used to live) has a copy of "Pod Igoto" in their library. They would let you use it for free.

I read this book for one of my classes at UW last year and came away both impressed and disappointed. Without any knowledge of the history, the story comes off as kind of corny. Some of the action is over the top, but it's a good story that explains the April Uprising through the eyes of Bulgarians. The best part is the subtle themes underneath what is known as an ultra-patriotic book. "Pod Igoto" is usually used by Bulgarian nationalists to support their agendas, but there plenty of instances in the book where Vazoz questions blind patriotism and solidarity of a nationalist agenda. Perhaps the greatest strength of the book is that is details village life in Bulgaria during the 19th century.

It's definitely worth a read. I wish I could have read it during my Peace Corps days. If nothing it will give you something interesting to chat about with a Bulgarian.

As someone else pointed out, Stoyanov’s "Notes on the Bulgarian Uprising" is really interesting and "Vreme Razdelno" is long, but probably a better written book than "Pod Igoto".