This is the informatics bible: Biomedical Informatics: Computer Applications in Health Care and Biomedicine (Health Informatics) https://www.amazon.com/dp/1447144732/ref=cm_sw_r_cp_api_i_sTmyFbSQMDQMH
This teaches all the fundamental concepts of EHR systems and other computer applications in Healthcare. I strongly recommend this.
Those books are definitely geared toward materials science. If you're interested in the operation of TEM, though, it should be helpful. The physics behind the instrument don't really change. In a virology lab, you probably work at lower accelerating voltages, and you might not be doing atomic-resolution work, so those bits wouldn't apply to you.
This book is cheap and discusses biological applications, so it may be a better starting point. Some of the springer publications are nice resources, but they can be quite expensive. You might want to check your school library for any books you may be interested in. Also, some of these things can be found for free in PDF form if you search hard enough online.
Most of the books I've used to learn about TEM are for materials science or specifically STEM and Z-contrast imaging. Those types of resources may not be as relevant to you.
Sure, Chen's book is like a holy book for us STMists (?, Shall we call ourselves by that name?). Here is the amazon link. This second edition came out recently. I am saving up some money to buy one for myself.
Did you figure out what other stuff you are gonna buy with that money? Maybe a good acoustic chamber?
The source of this image is Microcosmos: Discovering The World Through Microscopic Images From 20 X to Over 22 Million X Magnification by Brandon Boll (Amazon link). The Daily Mail wrote a review including several other images from the book a couple of months ago.