Michael Gregorio Books in Order
Michael Gregorio has written 9 books, published between 2006 and 2017. The first book is Critique of Criminal Reason (2006) and the newest is Lone Wolf (2017). Publication order is the reading order below.
- Books
- 9
- Published
- 2006–2017
- Pages on record
- 2,268 in 7 of 9 books
- Reading time
- 38–57 hours
Reading time is an estimate, not a recorded figure: 2,268 pages at 300 words a page, read at 200–300 words a minute, covering the 7 of 9 titles with a page count on record.
Michael Gregorio is a pen name shared by two writers, Michael G. Jacob, born in 1948, and Daniela De Gregorio, born in 1950. Nine books stand under it, published between 2006 and 2017, and two series are recorded: Hanno Stiffeniis and Sebastiano Cangio. Critique of Criminal Reason (2006) opens the catalogue and Lone Wolf (2017) is the newest entry, with Days of Atonement, A Visible Darkness, Unholy Awakening, Cry Wolf and Think Wolf between, alongside two 2012 books about Italy. Subjects record murder, investigation, police magistrates, park rangers and the Mafia.
How many Michael Gregorio books are there?
Michael Gregorio has 9 books, released between 2006 and 2017. They include 2 series and 2 titles listed outside any series.
Michael Gregorio Books in Publication Order
The table lists all 9 Michael Gregorio books in the order they were published, with the release year, the page count where one is on record, and how many independent book listings confirm each title. Catalogue data as of September 2026.
- 120064001/4
- 220073681/4
- 320094641/4
- 420104531/4
- 5Inside Italy2012 · confirmed 1/42012–1/4
- 6Fifty Shades Deeper Inside Italy2012 · confirmed 1/42012–1/4
- 720151921/4
- 820171921/4
- 920171991/4
Michael Gregorio books grouped by series
Each title below is a row in the publication-order table above. None of these groups has a reading-order page of its own on this site.
Hanno Stiffeniis in order
4 booksSebastiano Cangio in order
3 books- 1. Cry Wolf
- 2. Think Wolf
- 3. Lone Wolf
Standalone books
2 books2 Michael Gregorio titles here are not listed as part of any series.
Do you have to read Michael Gregorio books in order?
You only need to read Michael Gregorio books in order within each series: the books listed here span 2 separate series, and each series has its own publication order.
Where to start with Michael Gregorio
Start with Critique of Criminal Reason (2006), the earliest published title.
What is the newest Michael Gregorio book?
Lone Wolf (2017) is the newest Michael Gregorio book released so far.
Is there a new Michael Gregorio book coming?
No next Michael Gregorio book is announced in the catalogue, which is a gap in the listings it merges rather than a sign that the run has ended.
Michael Gregorio at a glance
- No recent titles
- The newest Michael Gregorio title on record dates from 2017, 9 years ago. No later title is catalogued.
- Release pace
- Michael Gregorio books have appeared about one a year on average.
- Length
- 2,268 pages across the 7 of 9 books with a recorded length, a median of 368 pages each.
- Busiest decade
- Most Michael Gregorio books, 6 of 9, were published in the 2010s.
What the Michael Gregorio books are about
7 of the 9 Michael Gregorio books carry subject tags in Open Library's catalogue. The subjects below are the ones that recur across them, most frequent first: hanno stiffeniis (fictitious character) is tagged on 3 of 7. The subjects are cataloguers’ headings, not a plot summary.
- Hanno Stiffeniis (Fictitious character) 3 of 7 books
- Investigation 3 of 7 books
- Italy 3 of 7 books
- Murder 3 of 7 books
- Police magistrates 3 of 7 books
- Thrillers 3 of 7 books
- Mafia 2 of 7 books
- Mystery & detective, police procedural 2 of 7 books
- Park rangers 2 of 7 books