Jenkins is no political pundit, but rather a professional politician cum historian. This is another succint but pithy work that is most readable. At least some (perhaps most) of Truman's pollitically relevant faults are visible in this work, which restricts itself to Truman's national political career. Jenkins work stands in contrast to David McCullough's later, rather hagiographic, biography.
An example of the difference of tone is that McCullough left me thinking that Ike's snubs of Truman were wholly gratuitous. Jenkins set me straight on that point while noting that Ike's behavior in this matter was less than wholly adult [indeed, he characterized the two of them as behaving like eight-year-olds]. On the other hand, Jenkins was, arguably, a bit more forcefully clear as to why Truman sacked MacArthur, why he should have done and why he should have done so considerably earlier -- with an interesting speculation as to how FDR might have handled the situation, had he lived so long.
For the full life of Truman (though to be read with an awareness that McCullough tends to expung all non-lauditory material), McCullough's 1100 page work is a good read. For a bit more reality testing, a bit more of the friction inevitable when decision makers have to make hard decisions -- and for a much quicker read -- Jenkins 200 page work is the better choice.
For the best view of Truman, read both.