With the "new and improved" Overdrive design, it has become more complicated to check out books.
First you click on "borrow". This gives you a pop-up that tells you the book is now on your bookshelf. Close that. Click on the "go to bookshelf" link.
The book you just checked out will be in the upper left-hand corner. Next to the cover photo there maybe a green link - it will say Kindle or Read. Under that is a drop-down, click on that. This is where you can choose epub, PDF, etc. If there is no Kindle or Read option, there will just be the drop-down. Choose epub, open epub, etc., then they will ask you to confirm. After confirming your choice, a "download" button will appear.
Download as you usually do.
What nincompoop designed this? Sheeesh!!!