I recommend reading with a Kindle or other e-reader so you can look up unknown words as quickly as possible.
On the kindle paperwhite, pressing your finger for a couple seconds will pull up the dictionary entry for that word. Sometimes instead of the dictionary it shows the wikipedia article entry if it’s a proper noun.
I read in Spanish on my kindle paperwhite because it’s about 20-50 times faster to look up a word on the screen than it is to switch to a physical dictionary.