Oxford University Press Scholarship Online has recently published an E-book / online library version of From Sheikhs to Sultanism: Statecraft and Authority in Saudi Arabia and the UAE.
Available here
For non-library members and the general public, the OUP Scholarship Online page also usefully supplies free-to-access individual chapter synopses (see under ‘Contents’). Quite detailed, these provide a good overview of the book’s overall thesis and key findings.
For further information on the book (with links to publishers’ websites and downloadable versions of the table of contents, the selected bibliography, and the full bibliography), please see its resource page.