In Read Alikes you can scan through the different genre and click on the title of a book you have read or are familiar with. This will bring up different options for you to try. Here's a snip of the page. Each click takes you into lots of other options with full bibliography and reviews as well!
In Literature-map, you write in the name of an author and you're given lots of 'floating' options of similar authors to try. This is what it looks like.
Let me know if you make some choices using these sites.