I guess that someone would read एक किताब as "eka kitaaba," but you drop the vowel sound and get something that sounds close to "ekh kitaab." All the letters are combined in a way so that it forms a word. As in, "e+ka" "ki+ta+ba". It takes time to really understand and read a word in Hindi with speed and fluency, but for now, you can simply just look at these tips I have for deciphering the script:
Look at the top. Usually, there will be strokes that influence what vowel will come after the consonant sound. You can look at the tips section on Lesson 1,2, and what I believe would be 3 to help you.
Look carefully at the "character"(I'm sorry, force of habit) which effectively determines the consonant sound. I would memorize the vowels and the consonants if I were you.
They look all bunched up, and it could be hard to read at first, but I know you'll do it! :)
However, as I said before, you need to drop the vowel sound. So there's no "a" or "uh" sound pronounced. I hope it's not too bad! I personally added the extra "a" since that's how I form-sorry, say it.
I personally like to think of it as similar to the word "kitap" from Turkish.