Caluclation puzzle books

I've been struggling to find books focused on helping calculation via puzzles. I'm not looking for any tactics books but "straight on" calculating books. Some books I know are Cheng's practical exercises, The Best Move by the Vlastimil brothers, Imagination in Chess by Gaprindashvili, and the Woodpecker Method by Smith and Tikkanen. I'm halfway on Cheng's book and find it relatively easy. However, When I did about 10 problems on The Best Move, I only got one correct. So, the level range I would like is a book harder than Cheng's book but easier than The Best Move(probably 1600-1750). Or perhaps I should move on to the Woodpecker Method after I am done with Cheng's book?

-Jimmy