Cloud Book vs Engine
The cloud book reflects real game samples while the engine evaluates the position itself. Use both together.
The cloud book and the engine are not substitutes. They are two different kinds of evidence: one comes from a large body of practical games, the other from position calculation. The cloud book tells you what people usually play. The engine tells you how the position looks when calculated right now. If you mix those up, it is easy to confuse habit with theory or treat theory as an isolated answer. The safer approach is to use them as two rulers that check each other.
Check the cloud book recommendation and sample distribution first to see whether the move is common in practice.
Then inspect the engine evaluation of the same position to check for tactical issues.
If they disagree, go back to tactics and structure before deciding.
Treat the cloud book as experience and the engine as correction; using both is usually more stable.