My son surprised me when he pulled out Tell the Time with Thomas for his book of the day. I haven't been able to find an AR level or reading level for this book, but my 7-year-old was able to read this with a little help from me on a couple of words. We've also been working on the clock in his math so being able to find the clock while reading is an added fun activity that helps the child relate the clock to real-life activities. Only hours were used in this book, but it does address the quarters of the clock at the beginning and ending if you want to go over those with your child as well.
I can't say that my son has been particularly into Thomas the Train at any point, but he has pulled different Thomas books the last two times he chose a book to read. And I like he enjoyed learning the names of the different engines and cars.
Tell the Time with Thomas is a fun activity book that can be used for your child's reading once they start. My son is still reading level-1 books, but he's starting to advance towards level-2. We both recommend Tell the Time with Thomas and give it 4 Stars. Have you or your child read Tell the Time with Thomas? What did you think? Let me know!