Solzhenitsyn's books - be it fiction or non-fiction - never ceases to amaze me. I am glad that now I have finished reading almost half of his major works. And according to my expectations, 'One Day' was as captivating as his other works (Though 'Gulag Archipelago' is incomparable and a massive work).
If anyone wants to read Solzhenitsyn for the first time and does not want to dive in into his other heavier stuff right away, then I would recommend reading 'One Day In The Life Of Ivan Denisovich' first. If you like it, then perhaps you can move onto more serious work. I myself plan to complete the remaining volumes of Gulag Archipelago soon now that this book has rekindled my desire to read Solzhenitsyn again.