Remember, sometimes the benefit of books is that they are written with students in mind. They can take complex subjects and explain them in a straightforward manner. Also, many of the ebooks are nicely broken down with background, vocab lists, and "chapter" presentations so that you get the complete picture of a topic. Searching in ebooks is also not as overwhelming as getting millions of results back from Google.
The downside to using books for research on genetic topics is that with rapidly changing information books are not the best place to look for the most recent changes. However, they are a great place to start research!
Transgenic plants, Transgenic animals, Transgenic livestock, Genetic Engineering, Genetic modification, Agricultural biotechnology