I have lots of Mills and boon books in print format
Can you tell me how can I convert them into an e-book?
Why would you want to do that? I checked Mills & Boon website and as such you have the option of buying in ebook format... The prices seem really reasonable at around 5-10 dollars...
If your intent is so that you can sell them - then be aware of the fact that you will be violating copyright and as such breaking the law... In the end you would waste a lot of time/effort/money...
If you really want to promote Mills and Boon publishing then why not approach them asking if they have an affiliate scheme or reseller scheme... If they do not then I suggest that you move onto something else...
Finally if the intent is that you want it in ebook format for personal use - then I recommend that you stop wasting your time and just buy it from the vendor directly - as the only way you are going to get a book into ebook format is to either manually type it up or scan each and every page, the best option with using an OCR scanner... Both options are extremely time consuming and is just not worth it when you can pick the ebook up for literally a few dollars....