A book a week is not difficult for anyone who enjoys reading and can devote even a modest amount of time doing it. Reading The Brothers Karamazov in a week is harder, but fine as a stunt. A ~300 page book in a week requires the average reader to read for about an hour a day. The equivalent would be running about 5 miles a day: hard if you don't like to run, a completely reasonable goal if you do.
The only weird thing about this, to me, is scheduling out your entire reading list in a sequence. For me, the joy of reading is in reading whatever I want to read next, or putting down a book to finish another book first. It would be like scheduling out your meals six months in advance, trying to predict what you'll want to eat for lunch on the third Tuesday in April. But, different strokes for different folks.