Like a lot of histories, this one gets bogged down in the details. When you're deep in the archives or in primary sources, every stray fact can seem like a revelation, and without some restraint they can all end up in the final version, which is what seemed to happen here. Every fire that burned down a state capitol (there were dozens), every whiskey-fueled fight (one in the Wisconsin territorial legislature resulted in a gunshot and murder), every stray rule about procedure in a state house (some legislatures banned ministers, bank officers and lawyers from membership) was put in here. The author was aiming for comprehensiveness, which is fine in a work that admittedly breaks new ground, and which seeks to be a reference, but it makes for slow reading.
The book does show the long and surprisingly circuitous history of many of legislative habits, from rules, to staffing, to pay, and so forth. Many practices did come from Parliament in England, but then they diverged. Parliament required three readings of a bill from the 1500s, and the state legislatures adopted this habit. But Parliament had stopped paying its members sometime in the same period, or slightly after, and yet all colonial parliaments created per diems. In 1844 New Jersey began limiting the number of per diems and giving a lower per diem after a set day, with the purpose of preventing extended sessions. Two years later New York cut off all per diems after a certain date. Massachusetts was the first to go for annual salary in 1858, and part of the purpose was to get legislators out of town fast.
In 1833, only 3 states had biennal legislature, Tennessee, Missouri, and Illinois, all of which established them with their first legislatures, but Delaware switched to biennal that year, and it was off the races. By 1890 only 6 states didn't have biennal legislatures, and then Mississippi (in 1890) and Alabama in (1901) went to quadrennial. All right-thinking people agreed this was the wave of the future. But after World War II, almost everyone switched back, so now there are only five states with biennal sessions.
The book is good on the odd sorts of legislatures that populated our histories. The chapter on territorial legislatures explains how Congress created a two stage process, a "district stage," and a second "popular" stage, for these before statehood. Originally too, thanks to the pleas of James Monroe, the upper house was appointed in the second stage, so as give Congress more control. But after Wisconsin in 1838, all territories started as the second-stage, and all started with an elected upper house. The corruption of the "bloody, fighting thirteenth" Arizona legislature, however, led to the Harrison Act of 1886, which limited debt to 1% of property, forbade legislating on toll roads or county seats, and other restrictions. In general, most territorial legislatures focused on where to locate the university, penitentiary, and capitol (some didn't decide until long after statehood. Connecticut's switched every year between New Haven and Hartford, before deciding on Hartford only in 1875, and Rhode Island didn't stick to Providence until the 20th century.) Starting with the Florida Territory, Congress funded the basic territorial per diems, but members had to buy their own pen, ink, and supplies, occasioning much complaint. In general Congress's control of the purse strings allowed them to push biennal sessions and limit membership size.
So some interesting facts here and real stories of institutional evolution, but I had to wade through too much much to find it out. For reference, of course, it can't be beat.