I wouldn't so much as call them schisms, given how the word is often used in the context of Christian and Islamic religious schisms. That being said, definitely A Concise History of Buddhism by Andrew Skilton covers the textual development of Buddhism, and then the development of the Mahayana, and the Vajrayana (though the latter in far less detail). The nice thing is that he also has a host of other sources in the bibliography dealing with region and topic. Regarding the development of different Vajrayana, specifically Tibetan, lineages, I'd recommend checking checking Indestructible Truth by Reginald Ray (though it's far from comprehensive), An Introduction to Tibetan Buddhism by John Powers, Indo-Tibetan Buddhism by David Snellgrove, and (though these last works will muddy the waters with politics, which is difficult to avoid once politics and religion become intertwined in Tibet, they are still good resources) Tibet: A History by Sam Van Schaik, and Tibet: A Political History by Tsepon W.D. Shakabpa. The History of Bhutan by Karma Phuntsho describes not as much the developments of the schisms, but the middle third of the book is very good at describing the sectarian conflicts, challenges, and equilibriums.