Russell Pavlicek has written a free e-book introducing readers to unikernels. I just completed it. The book is a concise, plain-spoken read that explains what a unikernel is, the problems unikernels address, the ecosystem surrounding unikernels, and the unikernel future.
I downloaded the e-book from O’Reilly and sent it to my Kindle. The formatting was fine — completely readable. O’Reilly hid the book behind a regwall, but I was able to easily unsubscribe from the mailing lists I was placed on.
I consider that a reasonable price to pay for a free book that I received genuine value from as I expand my knowledge of the nascent unikernel topic.
For more about unikernels, you could listen to our Datanauts podcast discussion with Adam Wisk, where we compare unikernels with containers on episode 63.