There really are 1001 problems in classical number theory here, and each one leads to the next so readers can progress at their own speed. As they read they will be enticed into trying just one more, succeeding, and moving on to the next, Ideal for self-study or for a year's worth of exercises, this starts with key elements from the theory such as argument, inequalities, divisibility, prime numbers, congruence, arithmetic functions, diophantine equations, and classifications of real numbers. The authors then work through the problems together with readers following basically the sequence in the text and providing solutions. The result is quite accessible and the innovative approach could serve as a model for a lively series.