Can't return directly to a book after switching to another app

What steps will reproduce the problem?
1. Open a book; 
2. Open "Recent apps";
3. Choose a dictionary and look up a word there;
4. Open "Recent apps" and return to EBookDroid/Press "back" --- and you'll be 
redirected to the bookshelf, not to the book itself.

What is the expected output? What do you see instead?
It should allow me to switch between apps (e.g. dictionary) and a specific 
book, until I press "back" to leave the app.

What version of the product are you using? On what operating system?
ebookdroid 1.3.2 on Android 2.3.7 (cyanogenmod)

What device are you using?
Samsung Galaxy S

Please provide any additional information below.
Previously it was possible to return to the reader from a dictionary with the 
"back"-key. Why hasn't it been possible to get there through "Recent apps" too?

Original issue reported on code.google.com by compound...@gmail.com on 25 Jan 2012 at 1:19

Merged into: #94

ailiboy / ebookdroid

Can't return directly to a book after switching to another app #133