I use Goodreads.

I speak English and some Spanish. When I'm wanting to read in Spanish, I usually stick to poetry or books that code-switch back and forth. Typically something like Pablo Neruda where the English / Spanish versions of the poem are on opposite pages or books that have Spanish words in them. I'd say, pick your favorite book to re-read in your native language and then try that one in English.

I read "Demon Seed" by Dean Koontz, and man was that a trip!