We're aware of an issue with converting some DOC, DOCX, ODT, and RTF files to EPUB through our Ebook Wizard.
We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.

Image size and overall ebook file size

I have successfully created a printed book some years back (THANK YOU Lulu!!) and am now working on my next book.

My plan is to start with an ebook and then later publish a printed version. My book will have quite a few black and white images. I have three questions.

1) What is the optimum size for an image?
Right now I am creating the images 4" wide at 200 PPI (800 pixels wide, height varies from image to image).

2) Is there a maximum file size allowed for the completed e-book?
I am barely into it and the total file size is already 1.2MB.

3) Is there a way to test the completed e-book on various platforms?
I use Calibre on my desktop and iBooks on my iPad mini. After some problems that evidently had to do with image size, I have been able to view my partially completed book on both platforms.

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